Last update: 4 August 2017
Opening an Excel object using Microsoft Internet Explorer may take a very long time (about a minute) until the Excel file is ready to use.
Internet Explorer Protected Mode activated.
In Protected Mode, Internet Explorer cannot modify user or system files and settings without user consent. Protected Mode requires the user to confirm any activity that tries to put something on your machine or start another program.
Understanding and Working in Protected Mode Internet Explorer
Turn off Protected Mode
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