Unable to re-add a previously deleted tenant to a multitenantorganization

Question

Unable to re-add a previously deleted tenant to a multitenantorganization

Michel van Driel 0

Recently, our company has acquired an existing business. I would like to leave their existing tenant intact, and would like to setup a multitenant relation.

I have created a multitenant organization in our own tenant and added the subsidiary's tenant. This worked. Then I unfortunately deleted the subsidiary's tenant from the organization.

After this action, the subsidiary's tenant showed up on admin.microsoft.com (shown as deleted), but did not show up when executing:

Get-MgTenantRelationshipMultiTenantOrganizationTenant

This only shows our own tenant.

When trying to add the tenant back into the organization, powershell tells me the tenant is still part of the organization:

New-MgTenantRelationshipMultiTenantOrganizationTenant -TenantID 'xxx'

New-MgTenantRelationshipMultiTenantOrganizationTenant_CreateExpanded: Tenant 'xxx' is already part of this MultiTenantOrg

As Microsoft's admin-page showed some information about data being deleted after 3-23-2026, I waited for this date and hoped some cleanup action would be performed and the tenant could be added again.

This is not the case, I am still unable to re-add the tenant to the organization. I am also unable to start over by removing our own tenant from the organization as it states another tenant is still part of the organization.

Setting up the relation from the subsidiary's tenant (by trying to join) also does not work, it states that the action has failed.

Not sure how to proceed here. Any suggestions?

Michel van Driel 0

As automatically suggested by this site, I have tried removing the tenant through powershell:

Remove-MgTenantRelationshipMultiTenantOrganizationTenant -MultiTenantOrganizationMemberId 'xxx'

Remove-MgTenantRelationshipMultiTenantOrganizationTenant_Delete: Unable to read the company information from the directory.
Status: 404 (NotFound)
ErrorCode: Directory_ObjectNotFound

This did not work...

Sridevi Machavarapu 26,995 Reputation points Microsoft External Staff Moderator

2026-03-24T15:50:20.4366667+00:00
Hello Michel van Driel,

This points to the tenant being left in a partial / orphaned state in the multi-tenant organization.

The delete didn’t complete cleanly, so the service still holds a reference to that tenant even though it’s no longer visible. Because of that, operations become inconsistent:

it doesn’t appear when you list members

adding it again is blocked as “already exists”

removal fails because the object can’t be resolved

Waiting for the retention date doesn’t clear this condition.

You can check if anything shows via the beta endpoint:

Get-MgBetaTenantRelationshipMultiTenantOrganizationTenant

If it’s not returned there either, then the tenant entry is effectively stuck in the backend. In that state, there’s no further action available from the tenant side to re-add it until that reference is cleared.

Also, please share those tenant details in the private messages tab.
Michel van Driel 0 Reputation points

2026-03-24T19:24:05.89+00:00

Details have been sent by private message.
The Beta-command gives the same results as the regular command, only showing our tenant, not the subsidiary's.

What is the best way to get this cleared in the backend?