Perhaps Thunderbird has lost track of the old profile and has created a new one. If this is the case then you should be able to reselect the original:

In Thunderbird Menu app icon > Help > More Troubleshooting Information Under 'Application Basics' section - near the bottom locate 'Profiles' and click on 'about:profiles'

It should open in a new tab. It should list all the profiles. Each profile would have a name eg: Profile : default Each profile will contain information such as: Default profile: Yes or No Root directory: this is the name and location of the profile where emails are located local directory: directory created and used by OS to faciliate runing of program profile. Below will be some buttons. You can set a different profile as default by clicking on 'Set as default' and then you can open that Profile by clicking on the 'Launch Profile' button

Did you locate the original profile or not ?

If you try to look for original profile and it says there is only one, which you are already using:

It is also possible you are still using the original profile name folder, but Thunderbird has lost access to it because of a problem with the 'prefs.js' file.

It would also be helpful to know the following information about 'prefs.js' files

Thunderbird Menu app icon > Help > More Troubleshooting Information Half way down - 'Profile Folder' - click on 'Open Folder' button

profile name folder opens in a new window showing contents.

Exit Thunderbird now

Make sure the view is showing 'details' - name, modified date, type, size columns Scroll down to see 'prefs.js' file Do you see more than one - maybe with additional number like 'prefs-1.js', 'prefs-2.js'  ? Do some have a zero size ? Please post an image showing all the 'prefs' files.

Open 'prefs.js' file using a simple text editor like 'Notepad'. This is the one Thunderbird is using. Scroll down to the section showing 'ldap' references. Post an image showing all ldap references.

If you have another 'prefs-n.js' file - where 'n' is a number' - locate the one with the highest number - open it and locate the ldap references and then post an image of what you see - make sure I can see directory info so I know which file is which.