Webmail and domain creation fails with 0x80070520 exception

Symptoms

After:

• Adding a new domain to the existing subscription with mail support;
• Adding a Webmail service to an existing domain;
• Selecting a certificate in Subscriptions > example.com > Mail > Mail Settings > example.com > SSL/TLS certificate for webmail

A following, or similar error is shown in Plesk:

PLESK_ERROR: Error: A specified logon session does not exist. It may already have been terminated. (Exception from HRESULT: 0x80070520)
In Microsoft.Web.Administration module Exception type: System.Runtime.InteropServices.COMException
at Microsoft.Web.Administration.Interop.IAppHostMethodInstance.Execute()
at Microsoft.Web.Administration.Binding.AddSslCertificate(Byte[] certificateHash, String certificateStoreName)
at Microsoft.Web.Administration.BindingManager.Save()
at Microsoft.Web.Administration.ServerManager.CommitChanges()
at ServerManagerFactory.commit()
at IISServerManager.commit(IISServerManager* )
at Commit common changes(WebServerManager::updateWebMailLinks line 2713)
at updateWebMailLinks()(WebServerManager::updateWebMailLinks line 2716)
at execute console command --update-webmail-links(vconsoleapp::start line 122)
at execute "C:\Program Files (x86)\Parallels\Plesk\admin\bin64\websrvmng.exe" --update-webmail-links "--config=tmpB2DD.tmp"(vconsoleapp::run line 139)
(Error code 1)

And following error can be found in %plesk_dir%\admin\logs\php_error.log:

ERR [panel] A specified logon session does not exist. It may already have been terminated. (Exception from HRESULT: 0x80070520)
In Microsoft.Web.Administration module 
Exception type: System.Runtime.InteropServices.COMException
 at Microsoft.Web.Administration.Interop.IAppHostMethodInstance.Execute() 
 at Microsoft.Web.Administration.BindingManager.Save() 
 at Microsoft.Web.Administration.ServerManager.CommitChanges() 
 at ServerManagerFactory.commit() 
 at IISServerManager.commit(IISServerManager* )
(Error code 1)

Or the following error can be found in Event Viewer:

A specified logon session does not exist. It may already have been terminated. (Exception from HRESULT: 0x80070520)
In Microsoft.Web.Administration module 
Exception type: System.Runtime.InteropServices.COMException
 at Microsoft.Web.Administration.Interop.IAppHostMethodInstance.Execute()
 at Microsoft.Web.Administration.BindingManager.Save()
 at Microsoft.Web.Administration.ServerManager.CommitChanges()
 at ServerManagerFactory.commit()
 at IISServerManager.commit(IISServerManager* )
at deleteAlias(alias.example.com, example.com)(WebServerManager::deleteAlias line 494)
at execute console command --remove-alias(vconsoleapp::start line 122)
at execute "C:\Program Files (x86)\Parallels\Plesk\admin\bin64\websrvmng" --remove-alias "--domain-name=example.com" "--alias-name=alias.example.com" --web "--web-mail=mewebmail"(vconsoleapp::run line 139)
Execute file name: C:\Program Files (x86)\Parallels\Plesk\admin\bin64\websrvmng.exe

Cause

An incorrect binding for Webmail with HTTPS support exists in MailEnable entry in IIS.

Resolution

1. Connecto to the server via RDP;
2. Go to IIS Manager > Server_name > Sites > MailEnable WebMail / webmail(smwebmail) > Bindings;
3. Check all records related to Port 443 via webmail.example.com > Edit:
• All bindings must have valid certificates.
  If any of them has Not selected entry in SSL Certificate field, then Default Certificate/Parallels Panel certificate should be set.