If you happen to log into your Office 365 Admin Portal on a regular basis good on you – though perhaps you can get most of your alerts through the Office 365 Admin app on your phone. If you do happen to log in though and you’re using Directory Synchronization by way of either Azure AD Connect or Microsoft Identity Manager, you hopefully don’t stumble upon a message like this on the Home page.
If you do though, don’t worry, it’s not just a red highlighted bit of text, but it’s a link to your Directory Synchronization status (not DirSync is no longer around… AAD Connect is the way to go these days). What does it mean to your end users if Directory Synchronization is failing? Well, any change that they happen to make to their profile within your on-premises Active Directory won’t be synchronized with Azure Active Directory until the issue is resolved. Not a big deal – right? Well, just think if you changed your password on-premises, you’ll still be using your old password through Office 365.
If you happen to click the error message though you’ll come to a page with this displayed, you’ll note that you see something like this:
If you’re not familiar with the above, it’s the Sync Status Health page. Typically if things are working good then you’ll see the last time that you sync’d successfully in addition to other pertinent information about your Office 365 tenant’s synchronization status as well as a less stormy picture of the cloud. 🙂
In this case though, the troubleshooting tips are fairly helpful and link to https://support.office.com/en-us/article/fixing-problems-with-directory-synchronization-for-office-365-79c43023-5a47-45ae-8068-d8a26eee6bc2?ui=en-US&rs=en-US&ad=US
In this case, it just happens to be that I turned off the server that the Azure AD Connect tool was running on. Turning the server back and on and the error messages go away and identity changes begin to synchronize once more – life is good.