I need some assistance removing Exchange 2010 after a Remote Move / Hybrid Migration from SBS2011 before decommissioning the server and just leaving O365 in the cloud. I might be overthinking the situation.
Original Setup - SBS2011 / Exchange2010
New Setup - Server 2016 Standard / Office365 Business - 80 mailboxes
AD Sync is currently setup on the Server 2016 box and working just fine. All I want to be able to do is Sync AD Users and Passwords between the 2016 Server and O365 Business. I no longer need Hybrid Exchange setup. User gets setup in Local AD, creates the object in AzureAD - I assign the O365 license, setup the email address and go. Future password changes stay synced between the Mailbox and local AD.
This is the first time I'm doing a Hybrid migration - I'm used to just doing a cutover style migration - once everyone is good in O365 I follow this guide to uninstall exchange - it's worked time and time again. - https://www.itpromentor.com/sbs-remove-exchange/
He does have another article with what appears to be my situation https://www.itpromentor.com/remove-hybrid-keep-sync/
but it sounds like some supported frameworks might have changed since. Currently the SBS2011 box I have doesn't serve any function currently.
Is it safe to just uninstall exchange 2010 like I normally do following the cutover migration?
Microsoft will give you an Exchange 2016 license for this, see here: https://support.microsoft.com/en-us/help/2939261/how-to-obtain-an-exchange-hybrid-edition-product-key-for-your-on-premi
There are documented ways around this with ADSIEdit, but you may run into support issues if you go down that route. I'd suggest firing up a small VM with Exchange 2016 on it before retiring your 2010 server.