You can open the users mailbox with https://server.domain.com/exchange/useralias (username rather than email)
Change “useralias” to exchange username.
Use domain admin username/password (prompts twice)
You can open the users mailbox with https://server.domain.com/exchange/useralias (username rather than email)
Change “useralias” to exchange username.
Use domain admin username/password (prompts twice)