Forum Discussion
outlook 2010 and cache mode
Hello, since last friday, a lot of our outlook 2010 (standard edition) can't send mail. There is a small message in right bottom which says outlook is disconnected, then reconnected and again recon...
You're connecting to Exchange Online - right?
If so, you are better off connecting with Outlook 2013 or Outlook 2016. As Microsoft notes in their system requirements: "Previous versions of Office, such as Office 2010, Office 2007, and Office for Mac 2011 may work with Office 365 with reduced functionality."
https://products.office.com/en-ie/office-system-requirements
There's also the slight problem that Exchange Online will soon (Oct 31) switch over to MAPI over HTTP entirely and drop RPC over HTTP (https://support.microsoft.com/en-ie/help/3201590/rpc-over-http-deprecated-in-office-365-on-october-31--2017). To have any chance of retaining connections, you have to make sure that you run the latest patches for Office 2010.
I'd upgrade...