- Unable to change mailbox size under Domains > example.com > Email Addresses > Mailbox > Another size with the following error :
The specified limit is invalid
Mailbox size parameter is set to Unlimited for subscription's service plan under Service Plans > service_plan_name > Resources .
- Subscription is in Locked status:
The subscription is not synchronized with Service plan settings.
- Synchronize the subscription with Service plan under Subscription > example.com > Unlock & sync .