You need to install SolsticeTM AdminSuiteTM 2.3 patch number 104468-06 or any subsequent revision of this patch before you add OS services to your server. You will find the patch and installation instructions at http://access1.sun.com/private-cgi/patch2html?README.104468-06.
If you are using Solstice AdminSuite with a patched Solaris release in which it is inadvisable or impossible to remove all the patches, then you will need to have the following file to add OS services:
2.5.1: MU3, MU4, and MU5
2.6: MU1 and MU2
With this workaround, Solstice AdminSuite is unable to track all the patches in a system. Use admclientpatch to add or remove patches to or from the system.
For a list of new platforms and the options that are available for this release, see the hardware manufacturer's documentation.
If you are unable to obtain the patch from access1.sun.com, go through your normal support channel.