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W10  2 PC's cannot map drives...

Office building with 4 separate offices...common router and each office on it's own subnet....
I support only 1 office...not the building...

2 PC's mapped drives to each other...they lose mapping about every 6 months or so...

Upgraded both computers to W10 Pro mid 2018...mapped drives both ways....about 6-7 months later the drive mapping was lost...got it back by deleting the mapped drives and re-mapping....been working fine until now...

Normal drive mapping process is not working...

Here is what I've done...
1.  Set static IP's on both comptuers...
      Judy PC  192.168.63.178 /24  gw 192.168.63.1
      DavePC   192.168.63.182 /24  gw 192.168.63.1
2.  Checked that C:\ drive on each computer was shared...
3.  Checked each computer has same username and pw...
4.  Successful IP mapping drive from JudyPC to DavePC...
    That mapping is working correctly...could not mapp with CN...

5.  Cannot  map from DavePC to JudyPC with IP or CN...THIS IS THE PROBLEM....
6.  At DavePC Network icon does not "see" JudyPC...
7.  Print and file sharing is on with both computers...

So I started digging and did the following...

Googling around I find mapped drives in W10 sometimes disconnect...so I ran...
net config server /autodisconnect:-1

I checked the Windows service Function Discovery Resource Publication  set it to automatic and started it...

So far....nada....

From JudyPC I can map a drive with IP to DavePC....that is working...
But I cannot map a drive from DavePC to JudyPC....AND I CANNOT PING JUDYPC  IP ADDRESS...

Appreciate any and all suggestions...
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Director, Information Systems
Commented:
What do you do for DNS?  I'm guessing you rely on your ISP for that, which would explain why you can't find devices by name.  One way around that might be to use a hosts file.  If internal name resolution has worked in the past, but doesn't any longer, I may be I'm wrong about your DNS situation.

Since you can create a connection in one direction, I'm guessing the problem is on JudyPC, and probably has something to do with that firewall blocking the connection, or the user account/password not being exactly right.  For testing purposes, turn off the firewall on JudyPC, and make sure you scope the login (JudyPC\username) when trying the drive mapping.

Another thing to try would be to map the drive to a different location.  Instead of mapping to \\JudyPC\C$, try \\JudyPC\C$\Temp and see if they symptoms change.

Author

Commented:
Paul...I have google dns set on both computers....that has been like this ever since I upgraded them to W10...and that was a clean install not "on top" of W7....

I didn't think about the firewall....windows firewall...I guess because it's worked before....I'll give it a shot...
And I'lll try mapping to a different location....
Many thanks...
Paul MacDonaldDirector, Information Systems

Commented:
"I have google dns set on both computers"
As you're using an external DNS provider (Google), you won't get internal name resolution which is why you can't find the computer by name.  I'm guessing you have a hosts file (as I mention above) that is helping with that.

Curious to know if any of the symptoms changed or if you've made any progress.

Author

Commented:
Sorry....I've been sick this past week and have not gotten back to my client.....Probably Tuesday....I will post results....thanks for checking in...

Author

Commented:
Well...finally got this working....I was sick for a week....then the client got sick.....

I don;t know the answer but now everything is working as it should....I have drives mapped to both computers each way...
And they are working....

Only thing I can think of is client reports that his problems started shortly after a MS update....and I am suspecting that another update
came down and fixed it....

But I don;t know.....I have not read anything about any MS update breaking mapped drives.....and unless one computer got the update
and the other computer did not......it really dons't explain the issue....

Paul....thanks for following up...

Author

Commented:
I did NOT go back to the ISP DNS...stayed with Google....
But I'm suspecting DNS had something to do with it...

Wish I had a good definitive answer....

Author

Commented:
I picked the answer...but I don;'t see a way to close the question...
Paul MacDonaldDirector, Information Systems

Commented:
Thank you for the points.  

"Closing" the question should be an option when you assign points - indeed this one says it's "solved" - so you're probably okay.  If you think this is still an issue, I can get a moderator involved to address the problem.

Author

Commented:
I've always assigned points before and then closed the question....but I don't see the options this time...