Excel COM Automation Fails with RPC_E_CALL_REJECTED and EXCEL.EXE Crash After Recent Office Update - Microsoft Q&A

A recent Office update causes Excel COM automation to fail with RPC_E_CALL_REJECTED errors and EXCEL.EXE crashes when using PowerShell automation over SSH, impacting remote Excel automation reliability.

“We have an intermittent Excel COM automation issue that started after recent Windows/Office updates. Environment: Windows Server 2022 Excel Version 16.0.20228.20186 PowerShell COM automation using New-Object -ComObject Excel.Application Automation initiated remotely via SSH -> PowerShell Symptoms: Excel workbook open…”

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