ab.dll Error Fix

What is a DLL?

The file ab.dll functions as the Microsoft Mail for Windows Address Book. It is an application component of the Microsoft Mail for Windows software.

DLL (Dynamic Link Library) files contain computer code and resources that can be used by multiple programs at the same time. This uses less system memory and helps your computer system run more efficiently. DLL files give program developers the ability to reuse code to add features to several programs without the need to write new code for each program.

There are many programs that require DLL files to function properly so when one of them is damaged or missing it will cause program crashes and poor system performance.

What is ab.dll?

The file ab.dll functions as the Microsoft Mail for Windows Address Book. It is an application component of the Microsoft Mail for Windows software. The file ab.dll has a file size of 97600 bytes.

Introduced in 1988 based on Intermail which is also a Microsoft product the earliest Microsoft Mail utility was made for AppleTalk Networks. In 1991 based on another in-house product called Network Courier Microsoft Mail was made for PC Networks. Recently Microsoft Mail was replaced by Microsoft Exchange Server version 4.0.

With the use of the file ab.dll Microsoft Mail can be utilized as a system where file sharing is done. Microsoft Mail acts a “post office” where files are stored in a database. To use this application the clients who write their mails must be using file sharing and mapped network drives. Between these “post offices” a mail is required to have Message Transfer Agents (MTAs) that run on the Microsoft Disk Operating System and interact with the ab.dll module.

While a post office can store up to only 500 mailboxes a sizable busy enterprise could require many post offices where many MTAs are attached. This situation becomes a huge problem because it could lead to file locking. As a solution a method emerged called Global Address List comprising of synchronized directories using MsMail 3.X directory synchronization protocol and the software dispatch.exe.

As an organizing staple in communications an address book is a database which functions as storage for entries called contacts. Consisting of some indispensable details such as name, address, and telephone number these contacts enter into systems that store the information in alphabetical order.

Recommended fix if you are experiencing ab.dll error messages:

DLL files are important parts of your operating system and many programs require them to function. When these files become damaged or are missing it causes poor system performance and system crashes. To fix these problems the user must replace the damaged file with a valid working version. If a working version cannot be found the user may perform a reinstallation of their operating system.

Ab.dll is created by:

Microsoft Corporation

Known file path:



Click the Download button below to run a free dll scan to find out if you have missing or corrupt dll files on your computer.

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