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When you use Outlook for Mac, you need to change the settings of the 'Work Offline' option. It will disable the automatic connection between the two applications. This will prevent your Outlook from trying to connect to the Internet. The settings for this feature may also be broken. If you want to use Gmail for Mac, you can enable the 'less secure' app access setting. In addition, if you want to use Gmail for Mac, make sure you have the "less secure" option turned on in the 'Settings' section.

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