An error which mentions "This task was cancelled before it was completed" is our topic today. If you come across this error without canceling the sending process manually, you can follow our steps to figure out the causation and take corresponding measures to get rid of it.

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6 ways to fix Outlook error “This
task was cancelled before it was
completed” efficiently

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Before this, we have probed into many
errors which is related to Send/Receive
Progress.
And in this presentation, we continue to
explore one similar problem displayed as
error code 0x80048002 mentioning “This
task was cancelled before it was completed”.
This issue usually occurs when people
cancel the sending process manually.

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However, if you never cancel the process,
the error still happens.
Then, it’s time to take actions.
Now, let’s follow steps below to find its
causation and solve the problem rapidly.

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1. Check Email Account Settings
Email account setting is one of the most basic
common factors, we can check it in the first place.
① Start Outlook and go to “File” menu.
② And click the “Account Settings” button.

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③ Next, choose the account that the error occurs to
and click the “Change” button.
④ Finally, examine the concrete settings then.
Note: If you are uncertain about the incoming &
outgoing server, please contact with the server admin.

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2. Cancel Antivirus Software Integration
with Outlook
If the settings is OK, then we can turn to another
basic factor—Antivirus Software.
Antivirus software scanner has to scan all the
items in Outlook and has rights to delete or isolate
any emails due to its job.
Therefore, it can slow down the Outlook or even
evoke errors.
 Just disable it in the app itself or in Outlook add-
ins page.

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3. Remove Harmful Add-ins in Safe Mode
In one occasion, if some third party apps have
installed incompatible plug-ins in your Outlook,
then errors occur as well. We have to check it out.
① Firstly, quit Outlook and go to “Start Menu”.
② Then type “outlook.exe /safe” in search field,
and click the appeared program to start Outlook
in safe mode.

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③ Then try to send the emails again. If it works as
usual, add-in is the criminal.
④ Next you should go to “File” > “Options” > “Add-
ins” > “Go”.
⑤ Finally in the new dialog, just unselect the all
third party add-ins.

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4. Launch Outlook in Windows Clean Boot
Mode
Provided that the error 0x80048002 still persists
in safe mode, you could try to restart Outlook in
clean boot.
① At first, head to “Start Menu” and type
“msconfig.exe” in the search field.
② Then press enter to open it.

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③ Next in the following interface, under “General”
tab, choose “Selective startup”, and unselect
“Load startup items”.

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④ Then switch to “Services” tab, select the “Hide
all Microsoft services” checkbox and then click
the “Disable all” button.
⑤ Finally click “OK” and restart the computer. Then
open Outlook to check if it can work regularly.

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5. Solve the Error Via Inbox Repair Tool
If above methods cannot make things better, you
need a repair tool to help you.
Firstly, you can attempt a recovery via Inbox
Repair Tool which is offered by MS.
Just follow its instruction to perform the process.

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6. Call in an External Repair Tool
As there is a chance that the built-in software
might not be able to resolve the problem.
In this circumstance, you should go opt for a
surpassing tool like DataNumen Outlook
Repair as an alternative scheme.

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THANK YOU !!!