The easiest way to convert address books in LDIF format to MAB format, would be to download Mozilla Thunderbird and do the conversion with this program. You can download Thunderbird for free and it supports both these file types, so it is an obvious choice for ldif to mab conversion.
Convert LDIF address book interchange format to Mozilla address book.
We found one software available in the database for this conversion.
Microsoft Windows software - convert ldif to mab on Windows
An easy to use e-mail client from Mozzila
Convert from ldif file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.