Does the data file size remain unchanged after Outlook deletes or archive emails?

Fault symptom:
Why does the data file size remain unchanged after Outlook deletes or archives emails.
Cause analysis:
Originally, the original file structure will be retained during archiving, and compression is required to release this part of space. Compression runs automatically in the background only when the computer is idle and Outlook is still running. Therefore, you cannot immediately see that the data file is smaller.
Solution:
You can manually compress data files to immediately release space.

Outlook 2010:

 

Open"File> Information", Click"Account Settings"Button, select"Account Settings".

 

Figure 1

 

Switch to"Data files"Tab, select the data file, and then click"Set".

 

Figure 2

 

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Click"Start compression"Button.

 

Figure 4

 

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