Dirsync on DC with pre-existing SQL Server Express


We are rolling out Office 365 to a number of schools.  As part of this process we want to deploy Dirsync.  Each school typically has a single server which acts as a domain controller, file server, printer server etc. Often, they also have SQL Express already installed in order to support MDT, WSUS and other applications.

Can anyone advise whether is it possible to install Dirsync onto a DC with a pre-existing SQL Server Express installation?  Will it fail because there is an existing SQL Server installation, or will it just add it's own database on top of the others.

I have read many articles about installing it on systems with full-fat SQL Server installed, but opinions regarding the Express release seem ambiguous.

Thanks for your help.
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Vasil Michev (MVP)Commented:
I've had it running on one 2008 R2 box with WSUS, but dont remember which one I installed first. Think it will be fine, it should just create a new database. That was dirsync however, the logic might have changed with AADConnect.

I'd avoid putting it on a DC unless there really isnt any other option available though.

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MarkoIrelandAuthor Commented:
Thanks for the tip.  Didn't know about AADConnect - Dirsync is still the download offered within our version of Office 365.
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