Hello,
I am working with a client who use FIM 2010 R2. It is taking inputs from 3rd party applications, and then using the information from the application to provision an account in AD including the users mailbox for Exchange.
There are multiple management agents, one management agent then pushes a subset of users accounts from AD to 365. The subset of users is close to 50,000 users.
We are in the middle of a POC office 365 migration which will involve pushing a further 6-7 thousand users to 365 from the same AD.
FIM could accomplish this for us, but due to complications that I wont go into here, we are looking at other options. The option favoured is to implement AADSYNC into the same domain in addition to FIM. So to clarify, this would result in having FIM and AADSYNC in the same AD forest, same AD domain, syncing different accounts.
I have on many occasions read that you can only have one DIRSYNC, FIM, AADSYNC instance per forest. We are working with a 3rd party consultancy who advise that whilst this may not be supported, it is technically possible.
In context to the above scenario, my question is:
a) Is it supported by MS to have FIM and AADSYNC in the same forest
b) Is it recommended
c) What are the drawbacks if it is possible but not recommended and not supported
Thanks very much