Question about mail merge in Word

[p73]

Hi


I've been looking for the answer but I haven't found it on board that's why I have a question.
Is there possible to create mail marge in MS Word with the source database in the same file. I know that it possible to do it in external file like mdb or xlsx.
There is need to do it in one file because I need it to send to wide range of users and I'am afraid that sending to users two files soon or later will cause lost of link between them and make problems with relinking files.

I don't know if it's possible at all but maybe somebody knows how to do it.

Thanks a lot
Regards
Paul