Exchange 2013 e-mail address policy based on account creation date

Hello experts,

We've acquired 3 enterprises over the past 4 years.
When we built our Exchange server, we decided to have an address policy with the 4 domain names, applied to everyone.
Here is how it looks like:
firstname.lastname@domain.com
firstname.lastname@domain1.com
firstname.lastname@domain2.com
firstname.lastname@domain3.com

Starting this year, we want a policy that will assign ONLY the primary domain to our newly created users
firstname.lastname@domain.com
But, we want to keep the old suffixes to our accounts already created.

Is there a way to apply an address policy based on account creation date?

If not, what is the best practice in case you want a policy for new accounts only?

Thanks,

Martin
deewaveAsked:
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Satyendra SharmaMicrosoft UC Technical ArchitectCommented:
Hello!

If i understand your situation correctly your current email accounts already have 4 smtp address and one of them acts as primary and for all the new accounts you only want 1 email address which obviously is going to be their primary address as well.

If my understanding is correct then you just need to update your primary email address policy to only stamp 1 email address and remove the other 3, this will not remove the additional email address from the existing accounts and will only stamp 1 email address on the newly created accounts.

And as long as you don't delete any of the accepted domains for other domains the existing users will continue to receive emails on the other domain email address.

https://technet.microsoft.com/en-us/library/bb125137(v=exchg.150).aspx
https://technet.microsoft.com/en-us/library/bb124580(v=exchg.150).aspx
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Will SzymkowskiSenior Solution ArchitectCommented:
If not, what is the best practice in case you want a policy for new accounts only?
Your default EAP should have the lowest priority. When you create new accounts and they do not have any of the other EAP criteria, that account will only get the default EAP with is the "catch all".

Is there a way to apply an address policy based on account creation date?
This is not possible. EAP are defined based on criteria within the Active Directory / Exchange Account.

If you want to change a specific user's email address using EAP, you can do this and it will also retain the old smtp address from other EAP that were applied previously.

Will.
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deewaveAuthor Commented:
I though changing the policy would update all my current users.
My understanding was wrong. Thanks Satyendra
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