Open Source Document Management

I have users from multiple OUs.

For other applications, I set the base user node to the Active Directory root (site.local) and filter with via group. It does not appear I'm allowed to do that with this software as the connection fails.

I can connect with one OU or the other.

If I add the second OU, the connection fails.

Yes, this is possible,
you can specify more than OU separating them with semicolumn ';'

or you can start the search from the super node (parent node)