Max.hofer said

Where must i place the user.js for working on all new profiles. in "C:\Program Files\Mozilla Thunderbird\defaults\profile" it did not work

I am not surprised.

This recent discussion on the Thunderbird enterprise mailing list might interest you https://groups.google.com/forum/#!topic/tb-enterprise/DRUj1bi3KJA

you might also be interested in using the GPO route. https://mozillagpo.sourceforge.io/#about-features I know nothing of the project but someone is working on it.

Hi Matt.

i did the setting in general-settings.js for thunderbird.cfg

then i rename user.js to thunderbird.cfg and put it in the root of installdir.

so when i start now tB error appears : cannot read cfg file ?

http://kb.mozillazine.org/Locking_preferences TRY: Using info at above link... local-settings.js (You named yours 'general-settings.js') with the content which points to mozilla.cfg (You named yours 'thunderbird.cfg') goes here: If 32 bit: C:\Program Files\Mozilla Thunderbird/defaults/pref folder If 64 bit: C:\Program Files (86) \Mozilla Thunderbird/defaults/pref folder

This contains the user pref locked perferences. Save as 'mozilla.cfg' (You named yours 'thunderbird.cfg') and put file here: If 32 bit: C:\Program Files\Mozilla Thunderbird folder If 64 bit: C:\Program Files (86)\Mozilla Thunderbird folder

Post image showing all contents of the files: local-settings.js showing content (You named yours 'general-settings.js') mozilla.cfg showing content (You named yours 'thunderbird.cfg')

Similar not reading issue here was resolved. In this case, string was not in quotes and a secondary required preference had not been set. https://support.mozilla.org/en-US/questions/1219799

Hi. i changed the settings like your description. i renamed user.js thats working in version 24.0 to mozilla.cfg after start TB message popup with error : "configuration can not be read. please contact your administrator"