Files with appdomainzip extension can be found AppDomain packages resource present within IBM BAR archives, which are used to deploy IBM software solutions.
APPDOMAINZIP file extension - IBM AppDomain package
What is appdomainzip file? How to open appdomainzip files?
File type specification:
File extension appdomainzip is used for one of the formats in modern IBM software solutions.
According to IBM website, a typical .appdomainzip file is present in BAR archive for each AppDomain that contains .NET assemblies that are used by a message flow.