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Remove Exchange after Office 365 move

I'm now ready to remove our exchange server (all rolls on one box), after our cutover migration to o365. I've removed the batch several weeks ago from o365, all the mail flow is working great and clients are up to date. I've had the server shutdown for 2 weeks with no complaints.

I know the process is disable all mailboxes (not remove as that will remove the domain user). Remove the databases, and run setup to remove. My concern is around AD Connect (formerly DirSync). We don't use it now, but I had planned on turning it on. My understanding is that when I remove Exchange it will take some attributes away like SMTPAddress.

So when/if I decide to turn on AD Connect for single sign on, would I then have to script/set the attributes manually?

Most of the googling I've done are old, and I'm not sure what if anything has changed since DirSync days.

Peter Hutchison

Once the schema is extended when Exchange is installed. The attributes will stay there for ever, you can still view them via the Attribute Editor in AD Users and Computers e.g. mail, proxyAddresses, extensionAttribute(s), msExchRecipientType.

Once you remove the last Exchange server you will not be able to use the EMC or Powershell commands to Mail enable, Mailbox enable accounts in AD. You have to use the ADUC console and the Attribute Editor manually.

bhieb

ASKER

Perfect so if I decide to enable AD Connect in the future the existing user attributes will be there, any new ones I'd have to enter manually? Do you know what Attributes need to be added to a new user?

ASKER CERTIFIED SOLUTION

YMartin

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