Does my MIIS AD MA account need to be a domain admin?
The answer here is no. People often grant these accounts domain admin rights to quickly get things working, but this would not be considered a best practice.
The best practice is to only grant the account the specific rights it needs to function. This includes:
- Grant the account read access to all OU's where objects will be imported from.
- Grant the account read, write, delete in OU's where provisioning and deprovisioning will occur.
- Grant the “Replicating Directory Changes“ right according to Q303972 (https://support.microsoft.com/default.aspx?scid=kb;en-us;303972).
This keeps the access to AD by MIIS limited and your operation more secure.