Make sure the Caps Lock is not on. Try using an external keyboard (or another external keyboard if this is a Desktop system).
>>> caps lock is not on. Yes, this is an iMac but I also have tried to access it with Macbook. Same result
It sounds like with Big Sur or earlier you were able to connect this Mac to the NAS and the only change was installing Monterey?
>>> yes started with Monteray
How are you trying to connect to the NAS? Are you using the Finder's "Go ---> Connect to Server ..." and using "smb://<ip-address-dns-name>/<share-name>"? Are you using the correct share name/share point?
>>> Yes, using "Connect to Server" as I always have. Tried IP address and NAS Name as well.
Connecting to the NAS by browser or Finder may make a difference. Do you actually access files while logged in from a browser? or is that just an administrative interface for the NAS? An SMB share can have a completely different username and password from that used to administer a NAS.
>>> It is the admin interface but you can access files, which I have. I have tried access as Administrator and User as well.
Have had several exchanges with Synology who are quite sure what the issue is. The last exchange was:
"You may have to reach out to Apple Support for more assistance but can you check if you have Private Relay active in Monterey?
Also, ask them if Monterey supports SMB 1, 2, or 3. If so where can it be enabled?
Additionally, does it support NTLMv1 Authentication or automatically use NTLMv2 Authentication?
I've tried to check on "Private Relay" is definitely part of Monteray but it's also buggy and all I get is a "spinning wheel" when I tried to access it.
The last 2 questions I am not sure.
It feels like it's definitely a Monterey issue.
Thanks for taking the time to reply.