Our experience migrating from Exchange Server to Microsoft 365
We recently performed a migration from an on-premises Exchange Server to Microsoft 365. Our goal was to transfer mailbox data while minimizing disruption to users. Before starting, we reviewed the source mailboxes, Microsoft 365 accounts, permissions, network availability and mailbox mapping. We then migrated a few test mailboxes to confirm the connection and verify emails, calendars, contacts and folder structures. For this migration, we used EdbMails Exchange Migration to connect the source and destination environments, map mailboxes and perform the migration in stages. Most historical data was transferred during the initial migration while users continued working. Before the final cutover, we ran an incremental migration to transfer newly received and modified items. After migration, we checked: Emails, folders, calendars and contacts Recent and sent messages Archive and shared mailboxes Item counts and migration logs Mail flow after the DNS changes Overall, the staged approach made the migration easier to manage and reduced the amount of work required during the final cutover. Our main lessons were: Always begin with a pilot migration. Verify permissions and mailbox mapping early. Run an incremental migration before cutover. Validate the migrated data before retiring the source server. The migration was completed successfully, and the structured approach helped us maintain data integrity while keeping disruption to users to a minimum.
Tenant to Tenant Migration from Existing Hybrid Model
Our company was recently acquired, and the desire is to migrate our tenant into theirs. - we are in a Hybrid deployment (1 remaining OnPrem Exchange server** and using AzureAD Sync) - we are a relatively small shop (~51 accounts w/<400GB total in mailboxes, 200GB in OneDrive, very little in SharePoint) - we create users and mailboxes OnPrem and migrate them to O365 and manage them OnPrem **In preparation and testing for this, I have taken our OnPrem Exchange server out of the mailflow, pointed the MX records to O365, disabled the connectors, etc and mail flows perfectly fine. I also created a test user in our LocalAD and synced that account to O365 (didn't create a mailbox on the local Exchange server), assigned licensing and let it create an ExchangeOnline mailbox and that mail flows fine as well. - they are not hybrid - they are using Azure AD Sync. They create and manage users in their local AD and sync them to O365 (same as we do) - they do not have any OnPrem Exchange, so all of their users mailboxes are created in the cloud automatically as licenses are applied. The question is, what is the best approach? We've looked at some third party utilities for the migration that look good, but the concern with that method is what happens then to my local AD and AzureAD Sync; managing the existing users that were created, synced and then migrated; and my local users authenticating to it, etc? Are we going to be able to fully decommission the last Exchange server and not lose the ability to manage our folks. I need them to authenticate to our Local AD so do I then point AzureAD Sync to the domain in the new tenant? We talked about the possibility of simply creating the users manually in the other tenant, then exporting/importing their data to their new accounts (instead of migrating the account itself) to remove the need to maintain an OnPrem Exchange server if the users weren't created locally then migrated. How then does that affect them authenticating to our local AD since as I understand it, you cant sync from AzureAD back to a local AD. What about the possibility (same as what I wrote in BOLD above) of recreating all of the users in my local AD (with a different UPN), not creating mailboxes locally, syncing them to 0365, assigning licensing and letting the ExchangeOnline mailbox be created automatically (no mailbox migration like we are currently doing). Then we could import their PST to their new mailbox. Now, the users WOULD exist in our localAD and when we migrate that new batch of users to the new tenant, we could point AzureAD Sync to the new tenant and it should sync. AND since they never had a mailbox on our OnPrem Exchange server, there would be no need to maintain it. Appreciate any help on working through this!
Large Dataverse Database Migration
Hello folks, Hoping someone has come across this challenge before - customer has a 1.5Tb+ prod database that needs to be reduced drastically. Is there a Support request route we can raise to create a DB copy into the customers Azure SQL? this would be the quickest route to get a copy before running bulk deletions. Long Term Retention wont be enough in this case either. Any thoughts welcome. TIATenant to Tentant Migrations - Which Third-Party Providers?
Hi there, We're going to be performing an O365 -> O365 migration for about 250 user accounts. I realise that we need to use third-party tools to do this and I've had experience using BitTitan.com for O365 migrations but the service is quite expensive and so I wondered if there were any other reasonably priced alternatives? We'd be looking at migrating Emails, Contacts, Calendar and personal OneDrives for all users. Thanks OllyTeams Delivers a Slack Migration Tool
Microsoft announced the availability of a Slack to Teams migration tool in the Microsoft 365 admin center. The new tool exists to assist the 79 million monthly active users of Slack who might want to move to Teams and don’t know how to get there. ISVs have been helping people move off Slack to Teams for years, so other migration options exist. https://office365itpros.com/2026/01/07/slack-to-teams-migration/
Migration Manager for Dropbox to Sharepoint
Hello, we've just migrated some dropbox folders and files across and noticed that the dates modified are wrong and aren't correctly showing within sharepoint or file explorer (via sync). Has anyone experienced similar issues with migration manager? Client is requesting for us to have this resolved and to ensure that the date modified shows the correct dates as shown in dropbox. Thank youHas anyone migrated from one Google Workspace to another after a company merger?
Hi all, Our company recently went through a merger and we now have two separate Google Workspace accounts that need to be consolidated into one. I need to move everything across, emails, contacts, calendars and tasks, for all users without anything getting lost in the process. Honestly not sure where to begin. Google's native tools seem limited for something like this and I don't want to start without a solid plan. Has anyone gone through a similar consolidation? How did you handle it and is there anything you wish you had known before starting?Support Live Session Migration for Windows 11 Enterprise Multi-Session AVD Hosts
Description Azure Virtual Desktop administrators regularly encounter maintenance scenarios where a Windows 11 Enterprise Multi-Session session host must be removed from service to apply urgent patches, investigate platform issues, replace a host, or perform emergency maintenance. The current approach requires placing the session host into drain mode and waiting for active user sessions to disconnect or forcing user logoff, which can disrupt productivity and user experience. It would be valuable if Azure Virtual Desktop supported live migration of active user sessions between Windows 11 Enterprise Multi-Session hosts within the same host pool, similar to the way virtual machine live migration minimises downtime during infrastructure maintenance. This capability would allow administrators to move active sessions from one session host to another without requiring user disconnection or application interruption. This feature would provide significant operational benefits, including: Reduced user disruption during planned and emergency maintenance. Faster remediation of unhealthy or degraded session hosts. Improved patching and update operations. Reduced dependency on large maintenance windows. Improved service availability for business-critical AVD environments. Better support for future hot patching and rolling maintenance scenarios. While Windows 11 Enterprise Multi-Session differs significantly from Windows Server and traditional VM live migration technologies, the ability to seamlessly relocate active user sessions between healthy hosts in a host pool would be a major enhancement for enterprise Azure Virtual Desktop deployments operating at scale.
How much of your Microsoft 365 environment can you actually see at once?
Not how many users you have. Not how many sites, teams, apps or flows you have. How much of it can you actually see connected together? I've been working across Microsoft 365 environments for a while, and I kept running into the same thing. There is no shortage of information. If anything, there is probably too much of it. Users, groups, permissions, SharePoint, Teams, Power Apps, Power Automate, Power BI, Dataverse, OneDrive, Exchange, Intune, licensing, configuration... It's all there. But when you're actually trying to understand how everything fits together, it can be a different story. You open one blade. Find something. Open another. Cross-check it. Go back. Open something else. Before long, you're jumping between different parts of the tenant trying to build the bigger picture in your head. And if you're working with larger environments, that gets difficult pretty quickly. The information isn't necessarily missing. The relationships between the information are what can be difficult to see. That got me thinking about a slightly different question: Instead of "where do I find this information?" "Show me what's connected to this." That's where VisibleState started. Start anywhere. Follow the connections. Imagine starting with a single user. Instead of seeing that user simply as a record with a list of properties, imagine being able to explore the relationships around them: User → Groups → SharePoint → Teams → Power Apps → Power Automate → Power BI → Dataverse → OneDrive → Exchange → Intune Then the questions become different: What does this user have access to? Is that access direct or coming through a group? What resources are connected to them? What depends on something they're associated with? Which licenses are involved? Are there relationships that look unusual? If something changes, what else might be affected? Those questions aren't necessarily about finding another piece of information. They're about putting information that already exists into context. A report can tell you that something exists. A connected view helps you understand what it is connected to. Illustrative example below — not a real customer environment. I'm not suggesting Microsoft 365 doesn't already give us this information Quite the opposite. Microsoft 365 already gives administrators an incredible amount of information and tooling. The thing I've been thinking about is what happens when you want to look across those boundaries. Sometimes I don't want another export. I don't want another list. I don't necessarily want another dashboard. I want to start with something I'm looking at and ask: "What's connected to this?" And then keep following the trail. That's the idea I'm exploring with VisibleState. The interesting part is what happens when you change the viewpoint The same relationships can be useful for completely different reasons. For example: Administrators may want to understand access, permissions and dependencies. Security and governance teams may want to find unusual relationships or exceptions. Compliance teams may need to understand who can access something and why. People managing multiple environments may want a consistent way to understand what's there without rebuilding the picture manually every time. Leadership may not need to see the graph at all. They may simply want to know what's important, what's exposed and what could be affected. It's still the same underlying environment. You're just looking at it from a different angle. And that's where I think things get interesting. Where I'm at with it VisibleState started as something I was building to make my own work easier. I was spending a lot of time investigating environments, tracing access and putting information together for reports. The individual tasks weren't necessarily difficult. It was the jumping between different places and reconstructing the bigger picture that took the time. So I started building something that would let me approach the environment through the relationships instead. It's grown quite a bit from where it started, and I'm continuing to build it. I'm not posting this as a product launch, and I'm not looking for people to sign up. I'm genuinely interested in whether the problem I'm seeing is familiar to other people working with Microsoft 365. So I'm curious... If you could start with any object in your Microsoft 365 environment and immediately see what it's connected to, where would you start? Would it be: Users and access Groups and permissions SharePoint and Teams Power Apps, Power Automate, Power BI and Dataverse Licensing and resources Governance and unusual relationships Something completely different Maybe you've already got a good way of doing this. Maybe you still find yourself jumping between different services and piecing things together manually. Or maybe I'm looking at the problem from the wrong direction. What's the one relationship in your Microsoft 365 environment that you wish you could see instantly?
