Trying to connect message when Saving in Excel 365

Anonymous

Split from this thread.

Same issue in our office. All users with O365. It started over this past weekend (07/09/2022). Only Excel files when doing a Save As, Browse. Some users experience it with File Open.

All other applications work without issue. Nothing in event viewer shows any problems.

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Anonymous

2022-09-09T02:07:36+00:00

Windows Server does not send Transmission Control Protocol (TCP) reset (RST) messages or Internet Control Message Protocol (ICMP) unreachable packets across a port that does not have a listening application.

According to below document, disable stealth mode on you file server, and DFS name server (If you use DFS) , let your server to send RST package to client immediately.
https://docs.microsoft.com/en-us/troubleshoot/windows-server/networking/disable-stealth-mode

After changing the reg, you need to restart windows firewall service on your server.

Now my user can save as very fast.
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Anonymous

2022-09-09T09:45:36+00:00

Thanks for that link. I wasn't aware that behavior could be modified.

Aside from that, stealth mode is an important security feature and I would not turn that off just to work-around a (temporary) bug in Outlook/Excel. Turning that feature off allows for easy reconnaissance of your Windows-based infrastructure.

Adding an outbound rule on the clients does not increase my exposure so I'm sticking to that until this issue is solved.
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Anonymous

2022-09-14T14:17:06+00:00
There has been some progress on this issue, the fix is now in the Current Channel Preview release. I expect this fix will get rolled out to the Current Channel on October 11th and the Monthly Enterprise Channel on November 8th. It looks like the issue will be in the next release of the Semi-Annual Enterprise Channel unless things change...

Not Fixed
```
Current Channel, Version 2208, Build 15601.20148 

Monthly Enterprise Channel, Version 2207, Build 15427.20284

Semi-Annual Enterprise Channel (Preview), Version 2208, Build 15601.20148
```
Fixed
```
Current Channel (Preview), Version 2209, Build 15629.20070
```
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Anonymous

2022-09-19T19:07:24+00:00

I just updated to the Current Channel (Preview), Version 2209, Build 15629.20070 and am still getting the Trying to Connect issue when saving files to a network share.

I don't know if they fixed it and then broke it again or if I have to restart my computer to actually get the changes full applied.
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Anonymous

2022-09-19T19:15:45+00:00

The fix worked for me, however, the next day, Office did an update and actually took me back to the most stable Office release which was 2208. So I went back and did the click to run fix again and applied the 2209 patch and turned off updates. It has been smooth sailing since with no issues. I have only tested on three PC's at this point, but I am slowly rolling it out to more machines.
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