Forum Discussion

Mike_AP's avatar
Mike_AP
Tin Contributor
Sep 19, 2026
Solved

New Outlook extremely slow to sync IMAP accounts

Hello - I am finding New Outlook extremely slow when syncing a couple of IMAP accounts, @yahoo.co.uk and btinternet.com. It can take hours, even days, although it does eventually catch up. A manual V...
  • Leonel1805's avatar
    Leonel1805
    Sep 20, 2026

    Hi,

    Summary:

    "Many users face this issue due to current limitations with IMAP support and authentication.

    Unfortunately, new Outlook Requires Microsoft Cloud Sync for IMAP:

    Unlike Classic Outlook, New Outlook forces all IMAP accounts to sync through Microsoft’s cloud."

    Take a look in this post: 

    https://learn.microsoft.com/pt-br/answers/questions/5521775/n-o-consigo-cadastrar-minha-conta-uol-no-novo-outl?from=ContactUsWebBCQR&CorrelationId=14059bc0-35f2-45a9-a91e-4778f97f0d4b

     

mbriscoe's avatar
mbriscoe
Tin Contributor
Sep 20, 2026

Is it possible to change the default to 'Classic Outlook' so you do not have to start with the new  and change to Classic Outlook?

 

 

MB

Mike_AP's avatar
Mike_AP
Tin Contributor
Sep 20, 2026

Thanks MB - yes, no problem starting Classic (in fact I'm now running New and Classic side-by-side). It would just be nice to have the newer software working properly.