I'm trying to import pst files into a new O365 tenant. The tenant already has multiple user accounts with payed (Office 365 E3) licenses, it's not a trial. Users are sending/recieving emails properly. As far as I know, to be able to import the pst files, I need to give my admin account the "Mailbox Import Export" role first, like this:
- Open an admin powershell
- Use command Connect-ExchangeOnline to connect to the tenant
- Run Enable-OrganizationCustomization to enable customization
- Run New-ManagementRoleAssignment –Role "Mailbox Import Export" –User "MyAdminUserName" to give my admin user the required role
Now the problem is that even after running the command in step 2 I'm getting an error message at step 4, telling me
The command you tried to run isn't currently allowed in your organization. To run this command, you first need to run the command: Enable-OrganizationCustomization.
I thought, okay I'll try to run step 2 again. But when I tried, I got the following error message:
This operation is not required. Organization is already enabled for customization.
So now what? Customization is enabled but not enabled? Did anyone face this issue before? I've done this many times in many different O365 tenants and never seen this happening.