Hello,

My company has fully migrated to Office365 (NOT Hybrid environment) from a local environment consisting of a single domain with a single exchange 2003 server.

Now I will be upgrading the domain to 2012, but I plan on removing the 2003 exchange organization first, before I upgrade domain to 2012.

Would this be the best approach?  Will this remove any needed the exchange attributes?

Thank you

Hello

tip: https://support.microsoft.com/en-us/kb/833396

Ok, didnt really answer my questions, but thank you.

Hi Robert,

After the migration is complete and you can retire your Exchange 2003, there are no any exchange attributes will be affected.

You can refer to the above link to remove the Exchange 2003 server from your organization.

Best regards,