Users Created in Exchange with Incorrect Primary Email - Hybrid Environment

Users Created in Exchange with Incorrect Primary Email - Hybrid Environment

We are running a hybrid environment with on-prem AD and Online Exchange. When we create a new user in ADManager Plus, the user is created with an incorrect primary email. When the user is created outside ADMplus the email is correct. Support has said,  "It came to our attention that when users create emails, they have different domains. Typically, this occurs because ADManager Plus connects with Exchange, and Exchange, having its address policy, supersedes the information shared by ADManager Plus in the email address field before applying the policy.

 We've encountered similar cases in the past, and we are confident that once the Exchange policy is modified, ADManager Plus will be able to transmit the correct field as desired, as the policy would not take precedence."

Has anyone else encountered this error and knows how to resolve it? 

As shown below, ADMPlus is pushing the correct email


However, when we look in AD and Exchange, it is assigning the user an alias as primary email instead.


Does anyone know what email policies may be in play here that is causing this to occur? When the user is created manually outside ADMPlus the primary email is correct. 

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