Azure AD Connect – Permissions Issues

I’ve had various versions of AD Sync/Azure AD Connect running in my development environment over the years, and have used a number of different service accounts when testing out different configurations or new features. Needless to say, the permissions for my Sync account were probably a bit of a mess.

Recently, I wanted to try out group writeback. It’s been a preview feature of Azure AD Connect for quite a while now – it allows you to synchronise Exchange Online groups back to your AD environment so that on premise users can send and receive emails from these groups.

Launched the AADConnect configuration, enabled Group Writeback, then kicked off a sync. Of course, I start getting ‘Access Denied’ errors for each of the Exchange Online groups – couldn’t be that easy!

Generally speaking, you need to also run one of the “Initialize-<something>Writeback” commands. When I went looking for the appropriate commands (as I don’t remember these things off the top of my head!), I came across an interesting TechNet Blog article: Advanced AAD Connect Permissions Configuration – it’s pretty much a comprehensive script that handles all the relevant permissions (including locating the configured sync account and sync OUs).

Gave it a whirl, entered credentials as required, and what do you know – permissions all now good!

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