Note:
The new callback URL takes effect after 2 minutes of successful modification.
The callback URL must start with http:// or https://.
If you have not applied for a domain name, you can directly configure an IP, such as http://123.123.123.123/imcallback.
Only can be used English letters (a-z, case-insensitive), numbers (0-9), and "-" (hyphen in English, i.e., middle hyphen).
Do not use spaces or special characters, such as !, $, &, ?.
"-" cannot appear consecutively, be registered individually, or be placed at the beginning and ending.
Domain name length not exceeding 63 characters.
The callback URL in IM includes port 80/443 by default. When replacing the callback URL, port adjustment is involved. Avoid mutually prefixed ports before and after replacement, such as changing https://xxx:443 to https://xxx:4433 or https://xxx to https://xxx:4433.