How to move SIP devices to other Tenant ?



I tried setting up SIP device in A tenant's SIP gateway and it worked. Now for some reason, I need to move the SIP device to B tenant. Before deleteing the mcaddress, I already made sure the device was signed out from the previous pairing. When the 'Sign-in' showed on the screen, I deleted the mcaddress from TAC, but not sure how to unenroll this device from *55* dial before. Next I reset the device to factory setting. 


When I provisioned the device to the B tenant, I noticed that the device show 'Sign-in' screen as if it's already enrolled before. When trying to pair with user in B tenant, it failed to get the account. Looks like it is still connected to the previous tenant. 


How do I remove this device completely from previous tenant? 

Since those tenants share the same provisioning server, is there a waiting time for the server to completely remove the mac address from its cache? 


Thanks in advance

1 Reply
best response confirmed by Vasil Michev (MVP)
Nevermind, it's really about waiting. After I let it for a night and couple more hrs, now the SIP device can connect to the new Tenant and works fine.