The file u2lexch.dll is part of the User Function Library for Exchange used by Crystal reports and created by Crystal Decisions. Crystal Decisions (formerly Seagate Software Information Management Group) created Crystal Reports, a widely-used software tool that integrates reporting functions into other applications.
Because Crystal Reports can be used internally in other programs, you may have difficulty finding the cause of an error relating to the u21exch dynamic link library file. We recommend cleaning your registry if you run across this error.
ZookaWare PC Cleaner is a program that checks your Windows registry against what is actually installed on your computer. ZookaWare PC Cleaner finds the errors and inconsistencies, and fixes them for you. When you get a dll error, most of the time it is just a registry problem. ZookaWare PC Cleaner finds those problems and cleans them up. When your computer’s registry is clean, your system runs faster and error-free, so try ZookaWare PC Cleaner.