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Microsoft Introduces Exchange 2016/2019 Extended Security Program
The Exchange Extended Security Update program is a 6-month lifeline for organizations struggling to upgrade servers to Exchange Server SE. Although it’s easy to upgrade a server to , many things might get in the way before the Setup program can run. Small things like vacations, buying new hardware, or deploying a new O/S. From August 1, organizations can sign up to receive security updates from October 2025 to April 2026. https://office365itpros.com/2025/07/17/exchange-extended-security-update/Exchange Online Reduces Delicensing Resiliency Threshold to 5,000 Mailboxes
A July 15 announcement says that Exchange Online is reducing the Delicensing Resiliency threshold from 10,000 to 5,000 mailboxes. That’s fine, but this feature should be available for all Exchange Online tenants. It’s a sticking plaster for how group-based licensing works and is inconsistent with how OneDrive for Business deals with unlicensed personal user data. https://office365itpros.com/2025/07/16/delicensing-resiliency-5000/
High Volume Email Account and Conditional Access
Hi all, We've set up a HVE account, and set up a Conditional Access Policy targeting this account to block sign-in to all cloud apps for any location except for the excluded IP address ranges. A couple of problems: 1. I can still authenticate and send from an IP address not in the excluded range. 2. I don't see any sign-in logs on Entra ID under this account. Has anyone been successful securing the HVE account with conditional access please? I've tested with a physical scanner and also 'Send-MailMessage' using powershell - none of the authentications are logged in Entra ID.
Thunderbird and Microsoft Exchange server 2019 phantom folder
I am using microsoft exchange 2019 mail server. I use Thunderbird mailbox client And during folder transfer, deletion or renaming, phantom folders are created. I use the imap protocol. If I install this mailbox on another computer, the phantom folders are loaded. There are no such problems with Outlook. Can anyone tell me what to do about this?Retrieve folder favorites with EWS
Not sure if this is the correct place to ask, the old Exchange Development Forum is no longer available. We are trying to retrieve favorite folders (shown in Outlook as "Favorites") with EWS. To do that we open the associated items of the "common views" folder. Using MFCMapi and EWSEditor we have identified/guessed the PidTagWlinkSection flag to indicate an active favorite if it has the value 1. We do not know how to retrieve the folder that has to be associated with this favorite though. Any tips how we could identify this? GlenScales
How can I send an email from my Exchange Server to Microsoft Exchange Online
Hi, I have a requirement to route secure SMTP messages through my On-Premise Exchange Server to Exchange Online. What is the best way to do this? The Server was setup with a Send Connector to Exchange Online but I am not entirely sure about the process. Will I need to create a receive connector for secure smtp and point the apps and devices to sent to it? Will I have to get them to use an account that exists in Exchange Online to authenticate? What is the best way to do this? Thanks
HELP: can't login client computer, exchange server 2016
So I need to setup an exhange mail server for a school task. I need to be able to login on a windows client with an exchange account. I did everything right, installed the exchange server and connected the windows client to my domain "sendit.be". But am not able to login on my exchange account on my windows client (see screenshots) I hope someone can help me. Thank you in advance!Certificate Binding Issue Detected: '' Doesn't exist on the
Hi after the Exchane update in March, the EAC and OWA website crashed - white screen. I found out that the test was a problem with certificates. wII I set the appropriate certificates but the problem still exists in the healthcheck tests I still have ibnfo about a problem with the certificate, but they are not there?? Default Web Site Started False http - *:80: - NULL http - 127.0.0.1:80: - NULL https - 127.0.0.1:443: - CE1F23873453D9F733AD24D7DA7BBD83C275CDB4 https - *:443: - CE1F23873453D9F733AD24D7DA7BBD83C275CDB4 Exchange Back End Started False http - *:81: - NULL https - *:444: - CE1F23873453D9F733AD24D7DA7BBD83C275CDB4 Certificate Binding Issue Detected: 'CE1F23873453D9F733AD24D7DA7BBD83C275CDB4' Doesn't exist on the server and this will cause problems. Certificate Binding Issue Detected: 'CE1F23873453D9F733AD24D7DA7BBD83C275CDB4' Doesn't exist on the server and this will cause problems. Certificate Binding Issue Detected: 'CE1F23873453D9F733AD24D7DA7BBD83C275CDB4' Doesn't exist on the server and this will cause problems.
