If you are in trouble, after create new POP3/IMAP4 resource into Exchange cluster, expecially for symptoms like failed starting service that cause a restarting and switching node for all Exchange group.

The solution is simple, stop the Group (take offline) and go to service (start – run – services.msc), now find Microsoft Exchange IMAP4 or POP3 service (double click) and change the startup service from disabled, or automatic to Manual. Repeat the last step to every physical node. Now start your Cluster Group and all must be fine.