Problem statement
Are there any constraints or limitations that would prevent us from having multiple “enterprise connections” pointing to a single Azure AD instance? In our case we would have connection-a serving a subset of users under a subdomain [a.customer.com](http://a.customer.com/) and a second connection-b serving another subset of users under [b.customer.com](http://b.customer.com/).
Solution
There should not be any issues if you have multiple Enterprise connections pointing to the same Azure AD instance.