Microsoft 365 Apps Update Stuck at 50% Downloading error 0x87D0024A

Referring to any Microsoft 365 Apps update getting stuck in Downloading (50% Complete)

There could be multiple reason on Updates getting stuck..

1. To get brief understanding on what does a KB or update do, review https://www.catalog.update.microsoft.com/ 

Will get good information on a KB as well as old / new updates that are superseded or replaced

2. Logs to Review:

WUAHandler.log

Records details about the Windows Update Agent on the client when it searches for software updates.

UpdatesDeployment.log

Records details about deployments on the client, including software update activation, evaluation, and enforcement. Verbose logging shows additional information about the interaction with the client user interface.

UpdatesHandler.log

Records details about software update compliance scanning and about the download and installation of software updates on the client.

UpdatesStore.log

Records details about compliance status for the software updates that were assessed during the compliance scan cycle.

Microsoft Document link: https://docs.microsoft.com/en-us/mem/configmgr/core/plan-design/hierarchy/log-files

Entry in UpdatesHandler.log:

BeginDownload alternate update content failed. Error = 0x87d0024a

CDeploymentJob – Failed to download update Error= 0x87d0024a

Error in Software Center: 

3. Error Definition:

Office365 Updates failing with error 0x87D0024A The job is already connected

4. Probabilities of solution:

1. Reinstallation SCCM Client
2. Repair SCCM Client
3. Added devices exclusion, post scan cycle this will wipe info.. Remove exclusion
4. Language pack.. multiple DP & Redistribute content
5. Other blogs .. apiclient.dll is missing or corrupt.. 
• C:\programfiles\Common Files\Microsoft Shared\ClickToRun\ApiClient.dll
• Replacing this file from working machine can be tried

5. Fix I have applied:

• Software Center >> Installation Status >> Office 365 English (US) Language Pack >> Repair
• 30 min down time..
• Reinstalls office. Successful completion
• Updates & Retry MS 365 App updates 
• Completes Installs Successfully.
• Pre Restart Client OS before repairing language pack.