Error 0x8007007A when downloading Offline Address Book in Outlook

Some Microsoft 365 users may receive the error code 0x8007007A when you try to download an Offline Address Book (OAB) for a profile in Outlook on Windows eleven or Windows 10 computer. If you're afflicted by this result, this mail service is intended to help you lot with the well-nigh suitable solutions you lot can utilize to quickly ready this error.

Y'all will run into this error when the .prf (profile) or .msp (customization) file that you used to configure an Outlook profile was created using the Office Customization Tool (October), and you lot select the Enable offline use pick, simply you did non specify the directory path to shop the Offline Address Book files.

Error 0x8007007A when downloading Offline Address Book in Outlook

And so, if you lot're faced with this Outlook consequence, you tin can endeavor any of the recommended solutions below in no particular guild to resolve the error 0x8007007A when downloading Offline Address Volume in Outlook on your Windows 11/10 PC.

Check the directory path of the OAB file
Create new Outlook profile
Modify Registry

Let's take a wait at the description of the process involved concerning each of the listed solutions.

i] Cheque directory path of the OAB file

To ready error 0x8007007A when downloading Offline Accost Book in Outlook on your Windows xi/10 PC, this solution requires you to check the directory path of the OAB file, depending on the version of Outlook y'all have installed on your computer.

To cheque the directory path of the OAB file for Outlook 2022, practice the following:

Check directory path of the OAB file-Outlook 2022

In the Office 2022 OCT, clickAdd together accountsunder theOutlooksection.
Click Add orAlterthe account to be configured.
Click More Settings.
On theCached Modetab, select theConfigure Buried Exchange Style option.
Select the Use Cached Exchange Style option.
Select the Customize location for .ost and .oab files option.
Bank check theDirectory path to store Offline Address Book files text box.

Now, do either of the post-obit and click the OK button:

Enter a valid path in the Directory path to store Offline Address Book files text box.
Articulate theCustomize location for .ost and .oab files option.

To check the directory path of the OAB file for Outlook 2022, do the following:

Check directory path of the OAB file-Outlook 2022

In the Office 2022 OCT, clickAdd accounts under theOutlook section.
Click Add orModifythe account to exist configured.
Click More Settings.
On theCommutationtab, select theEnable offline useselection.
Bank check theDirectory path to shop Offline Accost Book files text box.

Now, do either of the following and click the OK button:

Clear theEnable offline use option.
Enter a valid path in theDirectory path to store Offline Address Book files text box.

2] Create new Outlook profile

This solution requires yous to create a new outlook contour. To practice this, follow the instructions in the guide how to prepare Error 0x8004010F, Outlook Information File Cannot Be Accessed.

3] Modify Registry

Modify Registry-Delete 001e660e registry key

Outlook cannot store the OAB files successfully, and the fault in view tin occur if the value data for the 001e660e registry entry is missing. The registry entry in question is used to control where the OAB files are stored by Outlook – this solution requires you to delete the registry entry.

Since this is a registry performance, information technology is recommended that y'all back up the registry or create a organization restore point equally necessary precautionary measures. Once done, yous tin can keep every bit follows:

Press Windows key + R to invoke the Run dialog.
In the Run dialog box, type regedit and hit Enter to open Registry Editor.
Navigate or jump to the registry key path below depending on the version of Outlook installed on your Windows 11/10 PC. Replace the <ProfileName> placeholder with your actual Outlook profile name.

For Outlook 2022:

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Profiles\<ProfileName>

For Outlook 2022:

HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\<ProfileName>

At the location, click on the Edit bill of fare.
Select Find.
Now, enter 001e660E into the search field to search for the registry central.
Select Discover Side by side.

When the result is displayed, make sure that the registry key is listed under the right <ProfileName> subkey. You lot can view the data of the001e660E registry value, and if it is blank, that'southward the culprit of the OAB download issue.

At present, right-click the registry key and select Delete from the context carte.

If you lot're unable to delete the registry fundamental, you can take buying of the registry cardinal and try the delete operation again.

Get out Registry Editor when done.
Reboot PC.

That's it!

Related post: How to restore Contact information in Address Book in Outlook

How do I force an Offline Address Book to download?

To force an Offline Address Volume to download in Outlook, do the following: On the Tools menu, point to Send/Receive, and so click Download Accost Book. In the Offline Address Book dialog box, check the selection for Download changes since terminal Send/Receive. Click OK.

How practise I troubleshoot the Outlook Offline Address Book in an Office 365 environment?

To troubleshoot the Outlook Offline Accost Book in an Office 365 environment, endeavour the following suggestions:

Make sure that the Global Address Listing (GAL) is up to date.
Manually download the Offline Accost Book so brand certain that Buried Commutation Fashion is enabled.
Brand sure the Background Intelligence Transfer Service (BITS) service is running on your Windows 11/10 PC.

Why does Outlook default to Offline Accost Book?

The master reason why Outlook default to Offline Accost Volume is because the default configuration for an Outlook client is to use Cached Exchange Mode. In Cached Commutation Mode, the default is to use the OAB, because it is more responsive than the online version.