Multiple subdomains under IIS7 are configured with https protocol at the same time, but IIS7 supports a single 443 port by default, causing port conflicts;
Solution: First configure different ports for each domain name. Example: 444, 445, 446, etc.
Then find: C:\Windows\system32\inetsrv\config\applicationHost.config
Find
and modify it to:
Remember to correspond to each site All modified.
Then reselect the certificate on the iis site and restart the iis site.
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