OTM File Extension

What is OTM file?

OTM filename suffix is mostly used for Outlook Macro Format files. Microsoft defined the Outlook Macro Format format standard. OTM files are supported by software applications available for devices running Windows. OTM file belongs to the Executable Files category just like 140 other filename extensions listed in our database. Users are advised to use Microsoft Outlook software for managing OTM files, although 1 other programs can also handle this type of file. On the official website of Microsoft Corporation developer not only will you find detailed information about theMicrosoft Outlook software, but also about OTM and other supported file formats.

Programs which support OTM file extension

Programs that can handle OTM files are as follows. Files with OTM extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

How to open file with OTM extension?

There can be multiple causes why you have problems with opening OTM files on given system. On the bright side, the most encountered issues pertaining to Outlook Macro Format files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The following is a list of guidelines that will help you identify and solve file-related problems.

Step 1. Get the Microsoft Outlook

Problems with opening and working with OTM files are most probably having to do with no proper software compatible with OTM files being present on your machine. This issue can be addressed by downloading and installing Microsoft Outlook or different compatible program, such as Microsoft Word. The full list of programs grouped by operating systems can be found above. The safest method of downloading Microsoft Outlook installed is by going to developer’s website (Microsoft Corporation) and downloading the software using provided links.

Step 2. Verify the you have the latest version of Microsoft Outlook

You still cannot access OTM files although Microsoft Outlook is installed on your system? Make sure that the software is up to date. Sometimes software developers introduce new formats in place of that already supports along with newer versions of their applications. The reason that Microsoft Outlook cannot handle files with OTM may be that the software is outdated. All of the file formats that were handled just fine by the previous versions of given program should be also possible to open using Microsoft Outlook.

Step 3. Associate Outlook Macro Format files with Microsoft Outlook

If you have the latest version of Microsoft Outlook installed and the problem persists, select it as the default program to be used to manage OTM on your device. The process of associating file formats with default application may differ in details depending on platform, but the basic procedure is very similar.

Change the default application in Windows

• Right-click the OTM file and choose Open with option
• Select Choose another app → More apps
• The last step is to select Look for another app on this PC option supply the directory path to the folder where Microsoft Outlook is installed. Now all that is left is to confirm your choice by selecting Always use this app to open OTM files and clicking OK.

Change the default application in Mac OS

• By clicking right mouse button on the selected OTM file open the file menu and choose Information
• Find the Open with option – click the title if its hidden
• From the list choose the appropriate program and confirm by clicking Change for all....
• Finally, a This change will be applied to all files with OTM extension message should pop-up. Click Continue button in order to confirm your choice.

Step 4. Verify that the OTM is not faulty

Should the problem still occur after following steps 1-3, check if the OTM file is valid. It is probable that the file is corrupted and thus cannot be accessed.

1. The OTM may be infected with malware – make sure to scan it with an antivirus tool.

If the file is infected, the malware that resides in the OTM file hinders attempts to open it. Scan the OTM file as well as your computer for malware or viruses. If the OTM file is indeed infected follow the instructions below.

2. Ensure the file with OTM extension is complete and error-free

If the OTM file was sent to you by someone else, ask this person to resend the file to you. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with OTM extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Verify whether your account has administrative rights

There is a possibility that the file in question can only be accessed by users with sufficient system privileges. Log in using an administrative account and see If this solves the problem.

4. Make sure that the system has sufficient resources to run Microsoft Outlook

The operating systems may note enough free resources to run the application that support OTM files. Close all running programs and try opening the OTM file.

5. Verify that your operating system and drivers are up to date

Up-to-date system and drivers not only makes your computer more secure, but also may solve problems with Outlook Macro Format file. It is possible that one of the available system or driver updates may solve the problems with OTM files affecting older versions of given software.

Do you want to help?

If you have additional information about the OTM file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on OTM file.