To run Ax in single user mode you need to reject new user from online user form as following steps
1. Click Area Page node: Administration -> Online users.
Fig 1
2. Switch to the Server
Instances tab on the Online users form.
Fig 2
3. Click the Reject
new clients button.
Fig 3
4. Click the OK
button.
5. Close the Online
users form.
Same as Fig 2
Accept New Client
To Accept new user you can follow step 6 to 9
6. Click Area Page node: Administration -> Online users.
Same as Fig 2
7. Switch to the Server
Instances tab on the Online users form.
8. Click the Accept
new clients button.
9. Close the Online
users form.