Hello Experts. I have exchange 2013 enterprise, with AD 2012 R2. We are planning on migrating to O365. I ran IDfix tool against our on-prem AD for preperation. It found duplicates for attribute: mailNickName. We have muiltiple domains (companies) under us, all in one AD domain, forest. Our policy for mailnickname attribute is, anyting before the '@' in smtp email.
For example for distribution groups: email@example.com, and firstname.lastname@example.org. The mailnickname for both would be 'customerservice'. Which means, there is duplicate. My questions are:
1. What specifically is the mailNickname attribute used for?
2. Will this be an issue with migration to O365, with syncronizing directories?
3. Can we make the mailNickName attribute be the entire smtp email address? This will solve the duplicate issue.
4. Can we make it so that the mailNickName attribute is not synced to the cloud? What effects will this have?
This is seeming to be a big issue for us, due to the number of companies we have under us. Any advice will be really helpful. Thanks in advance.