Very slow Outlook 2013 downloading e-mail in Windows 11
Windows 11 very slow performance in Outlook 2013. Consistent download speeds of 20Mbps for files, but Outlook seems to do almost nothing. CPU% is around 20%, and upload/download speeds are around 50kbps up/100kbps down. Repair of Office did not help. All drivers are updated. Dell Latitude 3520. Ran SFC and no corruption found. Defrag runs (NVMe disk) for optimization weekly. PST file is only 80MB in total size. It usually is attempting to synchronize folders at snail speed. It does eventually finish. User gets very low volume of e-mail (Less than 10 per day max). E-mail is hosted by Centurylink, who can find nothing wrong with his e-mail account.
I know this is not what you want to hear but "Per Microsoft, Office 13 is only officially supported up to Windows 10."
Also, as Microsoft is enforcing the elimination of Basic Auth Office 2013 will no longer work with Office 365 effective October 1, 2022. You may have more success with alternative mail servers like hosted services or your ISP.
As pointed out above, outlook 13 is now old and may not be supported. This may not help.
Anyway, you need to establish where the issue lies.
Sounds like other users are ok. Just one with a problem. If tuis is true, email service and wan are likely to be ok.
If just one user, is it his mailbox or his client?
Try setting up an alternative users mail on his pc. See how it performs (once initial sync is complete.)
Also, try setting up this users account on another machine. Is it still slow or ok?
ASKER
Several more Centurylink users have called to express the exact same issue. No problems found on any computers using other e-mail in the same software. Software includes Outlook 2021, emclient, and others. They all have the exact same bandwidth used. I tested one on my 200Mbps Spectrum service, and the issue remains. They all have just recently started having problems, and I am trying to get update from Brightspeed (new owners of Centurylink) to see if they have changed e-mail hosts. Some users are reporting sent items folders only go back to yesterday, and before this started, they had thousands of sent items.
Hmm. That does sound suspicious. Assuming you can prove other users are experiencing it too i think you need to insist its an issue centurylink end.
Would be good if youre able to establish if there are any common elements between the users with an issue. E.g. same internet provider, same os, outlook or other version etc etc.
ASKER
Different OS's, different program on each, All Centurylink DSL (Brightspeed).
if that is the only common element it seems fair to present that to them and insist it is investigated.
Great. Glad they’ve accepted the issue is at their end. Not much else you can do i suspect. Other than chasing them repeatedly :-)
If Thunderbird can access the account at acceptable speeds then there is an issue in Outlook. The user can then decide to either (a) pursue the problem in Outlook, or (b) use Thunderbird instead.
That is far slower than the worst DSL line I've ever seen. Are those numbers correct?