Hello @sakura_snow_blossom ,
There may be compatibility issues. You can try adding it to "Trusted sites" and then restart IE11.
I would like to confirm with you whether there is a problem with the image display in IE 11, but there is no problem in edge (edge displays normally)?
If so, please refer to the information below. Introduces the browser version information currently supported by exchange2019owa.
<< I use Internet Explorer 11 as my web browser for a reason.
If you have concerns, you can take a look at IE Mode in edge.
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