Group permission on public mail folder is not applied due to special characters in full name

[mrmarkuz]

When the full name of a user from an external user domain contains a special character like "á", the group permission is not applied to a public mail folder.

For internal user domains, usernames with special chars are not allowed in the UI.

Note:

For internal samba user domain the username is shown when listing the groups whereas for external user domains the full name is shown:

Internal user domain shows username like "markus":

[root@node ~]# api-cli run cluster/list-domain-groups --data '{"domain":"ad.nst.at"}'
{"groups": [{"group": "group1", "description": "", "users": ["markus"]}]}

External user domain shows full name like "Márkus Neuberger":

[root@node ~]# api-cli run cluster/list-domain-groups --data '{"domain":"external.user.domain"}'
{"groups": [{"group": "marketing", "description": "", "users": ["M\u00e1rtin Meier2", "Andi", "M\u00e1rkus Neuberger"]}]}

Steps to reproduce

• On a Windows server create a user with a full name containing a special character like "á"
• Add that user to a group
• Add the external user domain of the Windows server to the NS8
• Create a public mail folder
• Assign the group to the public mail folder
• Login to a mail client like Roundcube and try to access the public folder

Expected behavior

• The user in the assigned group can access the public mail folder

Actual behavior

• The user has no permission to access the public mail folder

Components

Core 3.15.0
Mail 1.7.4

See also

https://community.nethserver.org/t/public-mailbox-access-by-user-group/26672/3?u=mrmarkuz

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Thanks to Károly Nagy