Forum Discussion
Mike_AP
Sep 19, 2026Copper Contributor
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
Sep 20, 2026Copper Contributor
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