Greetings All,
This may get a little confusing so I will apologize now.
My company, Company A, has a mixed 2010/2013 on-prem environment. We had been using FOPE to filter our mail. About a year ago we acquired Company B who was on Office 365. Our directives required Company B to send and receive as Company A from day 1 of the merger. Company A had to remove companyA.com from FOPE and add it to Company B's O365 environment so that Company B could send and receive as Company A. Company A has their mail sent to an on-prem filter and relays to Company B through O365.
Fast-forward 12 months and we have all of Company B's mailboxes in Company A's on-prem environment and we want to again use EOP to Filter our mail. I want to remove all remnants of company A and Company B from Company B's O365 environment so I can add to Company A's EOP environment. Easy enough. However, my questions has to do with some pieces I had to put in place to make it work originally.
I had to add a federation trust with Microsoft and set-up Free/Busy Organizational relationships with Company B's O365 (and on-prem) environment. It's easy enough to remove the trust and organization relationships if needed. My questions are, 1) Is it necessary to remove them and/or does it hurt anything; and 2) Is there a specific order that needs to be followed?
I would like to remove them if not needed just to make it neater. However, this is not an environment that tolerates outages.
Thanks in advance for any advice,
Jack