How do you make a Shared Mailbox the default Send From account? (New Outlook)
I'm using Outlook for Windows version 1.2025.109.100 (on behalf of another user). I'm reading some suggestions online that say you need to add the account to Outlook first before making it the default Send From. I'm also looking at the Help section in Outlook that directs you to change this in the Compose and Reply settings. However, it's not possible to sign into a mailbox that isn't a user. I thought you used to be able to 'sign into' a shared mailbox using your own account but that is not the case now (perhaps it never was?). What it seems like is that we instead need to convert "Accounting" to a User account, give it a license, then sign into it in Outlook. That's not a Shared Mailbox - that's a user mailbox. I don't want to create a point of weakness for a potential cyber-attack (which we've had several). I can't really set up MFA for this account that no one can maintain. And I really don't want to have to spend money on a license to do something just because one piece of software is incompatible. Having to repeatedly instruct people and then repeatedly remind them to change their FROM account is just bonkers. On Outlook for Mac, as long as you're in the Shared Mailbox, the default FROM is that mailbox. (but, don't get me started on how much better the Mac version of Outlook is than the Windows version - see: All Accounts)
Unable to change mailbox permissions
Hi, We have inherited a Hybrid Exchange environment. It consists of 1 on-prem Exchange Server (Version 15.0 (Build 1473.3)) and M365. All the mailboxes have been migrated to M365 and ADSync is present to replicate to M365. The issue we have is that even as a Global and Exchange admin in M365, we are unable to edit the permissions of any users mailbox. Doing this via the M365 admin centre just returns a message saying "Something Went Wrong." If we try it in Powershell we get a "User is not allowed to call" message. We are trying to understand if this is an issue with M365 or we are trying to make the permission change from the wrong location? In a hybrid environment where all mailboxes have been migrated, from where you should you make permission changes to a mailbox? Is there something else we are doing wrong here? Thanks DBOffice 365 Message Attribution
When a message arrives at Office 365, one of the first things we need to do is figure out which organization it belongs to. At first, this sounds simple – just look at the recipient, right? Well, it is more complicated than that, because of Hybrid and complex routing scenarios.
User is unable to login to Mailbox
Hello experts, We are in Hybrid environment and one of the user which was recently re-enabled an AD account as the user is returned back to us, is unable to login to mailbox Steps we done Re-enabled the AD account and moved it to syncing OU and added license to enable mailbox I checked the recipient details in both on-prem and online On-prem results RecipientType : MailUser RecipientTypeDetails : RemoteUserMailbox Online results RecipientType : UserMailbox RecipientTypeDetails : UserMailbox What is the part that is missing here.SMTP Issue - Exchange 2019
Hi All, I have an hybrid exchange environment (365 + 2019), and the onprem server is used for smtp relay only. An internal app uses this relay and send email as "email address removed for privacy reasons", and all works well except by an specific message-subject. This application can send all the emails with any subject, but if the subject is "Purchace Order to be approved" the relay fails. Checking logs, I could see that when the message has this mentioned subject then the field "sender-address" is always empty (return-path is ok). And, of course, SPF/DKIM fails and message is quarantined. All other message subjects contain the address in "sender-address". This could be an issue with my application or something related to smtp config? Source for fields analyzing: https://learn.microsoft.com/pt-br/exchange/mail-flow/transport-logs/message-tracking?view=exchserver-2019 Thanks and happy new year to all of you.
ERP system with MS 365 MFA user
Hello Expert Comm, I need to send emails from the ERP system, and all settings are done, but I need additional security to enable the MFA for the user that will use this service as I know the MFA must not be enabled for this setting and Security Default must NOT be enabled for the organization. So, if you have any workaround to enable the MFA for the account that will use the ERP system please let me know I have MS 365 emails Thanks, KmohamedShared Mailbox - Deactivate Calendar and Contacts
Hey everybody, I am struggeling to find the solution to my problem on the web and cannot believe that this should not be possible. We are using a few shared mailboxes (info@... / accounting@... ). Each shared mailbox comes with its own contact book which all show up in my contact tab in outlook. As we don't use the contacts and calenders of these shared mailboxes, how to I get rid of them? Same for the calendars. I don't need 6 empty calendars in the overview. It must be an option to turn them off entirely. Thanks and best Regards, Florian
