Select the partners from the list view and then from the "Action" menu select "Mass Update".

After that one wizard opens, you can update multiple partner's salesperson from here.

Mass salesperson updated.

Now from the wizard, we update multiple partner's pricelists.

Mass partner's pricelists updated.

Now we update the tags. You can update tags by 2 methods, "Add" and "Replace".

Add: It adds new tags in old tags.
Replace: It replaces new tags with old tags, so it removes old tags. Here we update partners tags by using the method "Add".

Mass partners updated with the tags.

Now we update partners tags by using the method "Replace".

Mass partners updated with the tags.

Now we update the language of the multiple partners.

Mass partners updated with the language.

Now we update the payment term of the multiple partners.

Mass partners updated with the payment term.

Now we update partner type, You can update partner type by 3 ways, "Is a Customer", "Is a Vendor" & "Both".

Partner type updated.