Hello, I'm glad to answer your question. The first factor for large companies to change mailboxes is relocation, the second is system stability, and the third is some management functions and others in the background of administrators.
TOM's corporate mailbox is still suitable, with a high-level security system in the industry, which is maintained 24 hours a day. During the epidemic, the service system is 7*24 hours, so it is quite safe to change this mailbox.