The version of e.g. the AD adapter is available via the LDAP entry

erproperties=ProfileVersion=5.1.1005,erobjectprofilename=ADprofile,ou=serviceProfile,ou=itim,ou=…,o=…,c=…

To get the XML description of e.g. the AD account form:

idsldapsearch -b 'ou=...,o=...,c=...' -h 'localhost' \
              -p 389 -D cn=root -w '?' 'erformname=erADAccount' erxml

The configuration tool for the AD password sync plugin pfconfig64.exe needs to be run with adminstrator priviledges. This seems to be quite obvious and not worth being mentioned. However, it turns out, that with recent Microsoft Windows Versions at least in AD context, a user having administration priviledges still needs to select “Run as administrator” from the context menu. Otherwise the changes made to to config will be silently ignored.