Hi,
Thank you for posting your question in the Microsoft Community.
I understand that you are facing issue with sending message to another PC on the same network, I would suggest you follow the below steps and check if it fixes the issue.
- In the search box on the taskbar, type cmd in the and then right-click or press and hold Command Prompt.
- Tap or click Run as administrator.
Type: msg username /server:servername /time:seconds /v /w /? messagetext
msg sessionname /server:servername /time:seconds /v /w /? messagetext
msg sessionID /server:servername /time:seconds /v /w /? messagetext
msg @filewithnames /server:servername /time:seconds /v /w /? messagetext
msg * /server:servername /time:seconds /v /w /? messagetext
If the above step doesn’t solve the problem, let me point you in the right direction where you will be able to get the support for the issue that you are facing. I would suggest you to post your query in the TechNet, where you will be able to find support from professionals and members for issues related to sending messages over the same network.
Thanks,
Suman.B
Microsoft Community - Moderator