POP3 is the venerable messaging protocol from the 1980s that downloads requested messages to an e-mail client. However, if that setting is disabled, then users may experience the e-mail duplication problem. 25 forum post acknowledging the problem stated that Microsoft is 'treating this issue with the highest priority as we work to fix the problem.' No completion target date was mentioned, though.Īccording to the Knowledge Base article, if the POP3 messaging server is configured to remove mail from the server after a specified period of days, then the deleted e-mails problem may occur. The Knowledge Base article has instructions for both approaches. POP3 users can either configure their e-mail accounts to use IMAP instead of POP3, if possible, or they can revert to a version of Outlook 2016 prior to the Feb. 25, Microsoft acknowledged the problem and issued Knowledge Base article 3145116. One forum poster complained of getting 10,000 duplicate e-mails, which tipped the scales on that user's bandwidth quota. But instead POP3 users got heaps of trouble. This patch was supposed to add just a few feature improvements, including support for a new troubleshooting tool, according to Microsoft's description. 16, upping the e-mail client's version number to.

21, while another forum thread associated this same problem with an Outlook 2016 update issued by Microsoft earlier in the month. Complaints about duplicate e-mails appeared in a Microsoft forum on Feb. Those problems started showing up early last week. Microsoft is investigating an issue with Outlook 2016 when used with POP3 accounts that causes e-mail deletions from servers or duplications of e-mails in user in-boxes.

Microsoft office 2016 3 user