P365 ERS creates a number of transport rules and groups in both Source and Target Tenant. These will be removed by P365 by performing the following steps within your P365 Project. Please ensure all Domain Cutovers have been completed before starting this process
- Click Setup to Enter Project Setup
- Click Email Address Rewriting (Near the bottom)
- Select - No, Maybe Later then click next
- This will bring you back to the Main Setup Screen - Select Next again
- At the Discovery Screen select the X to not perform a Discovery
This will disable ERS and after about 30 minutes all the Transport Rules and Groups will have been removed from both Source and Target Tenants. There maybe some occasions where P365 is not able to remove all groups, if this occurs please delete these manually
When this is complete you will need to backout any SPF, DKIM and DMARC rules you may have changed to enable ERS. Note this is a manual task and is not done by P365
You can now archive the Project within P365 by selecting Archive Project from the P365 Portal
When this is complete you will need to manually remove the Powershell Accounts created by P365. They will be named BinaryTreePowerShellUser.xxxxx@xxxx.com