Ran into an interesting issue with one of our Exchange Online customer. Thought it probably worth sharing with the solution I found.
The customer has an Exchange Hybrid setup. Recently some of Office 365 Exchange Online users complain they cannot email to a particular on premise mailbox: [email protected]. The user bascialy does not show up in Exchange Online GAL. The on premise mailbox is working fine and other on premise staff can send emails to it without issue.
Recently I received some complains from our US users about the timestamp of our SharePoint site hosted in Office 365. The timestamp of the documents and folders on the site are all showing Australia Eastern time for them. It takes me sometime to find out how to allow each individual user to see their local timestamp. This requires some setting changes from the user end. Here is what needs to be done.
It happens to me quite a few times. After synced On-Premise AD user objects into Office365 through DirSync, users' specified UPN will not be synced correctly into Office 365.
Tried all the suggested tricks from Office 365 forum. None of them worked. I even tried to re-configure our DirSync settings. But the username in O365 just refuse to change. After banging my head on this issue for a few days. Eventually I figured it out, the solution is simply to revoke any O365 licenses assigned to the user.
Recently I was working on Exchange Hybrid Deployment for one of our customer. The Hybrid Configuration process itself went smoothly. No errors for HCW. The problems came when I tried to move mailbox to Exchange Online. The migration fails with error:
Target mailbox doesn’t have an SMTP proxy matching ‘.mail.onmicrosoft.com’"
To check that I ran the following command against the On-premise Exchange.
Get-Mailbox “O365 Test5” | fl and check the EmailAddress filed
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