Many ISPs impose monthly data caps (e.g., 1TB per month). If you reinstall Windows frequently, downloading 6GB of Office each time eats into your cap. An ISO allows a one-time download.
Use a free tool like AnyBurn or ImgBurn to burn that Office folder (plus setup.exe and config-365.xml) into a single .ISO file.
You now have a clean, malware-free, official Office 365 offline installer.
Prerequisites: A valid Microsoft 365 subscription, Windows 10/11, at least 10GB free space, and a stable internet connection (only needed once).
Step 1: Download the Office Deployment Tool
Go to the official Microsoft Download Center. Search for "Office Deployment Tool." Download the executable (e.g., officedeploymenttool_xxxx.exe). microsoft office 365 iso offline installer repack
Step 2: Extract the Tool
Run the executable. It will ask where to extract the files. Choose a folder like C:\ODT. Inside, you will find setup.exe and several sample configuration XML files.
Step 3: Create a Configuration XML File This XML tells the tool what to download. Open Notepad and paste the following code for a standard 64-bit English installation of Microsoft 365 Apps for enterprise:
<Configuration>
<Add OfficeClientEdition="64" Channel="Current">
<Product ID="O365ProPlusRetail">
<Language ID="en-us" />
</Product>
</Add>
<Property Name="SharedComputerLicensing" Value="0" />
<Property Name="PinIconsToTaskbar" Value="TRUE" />
<Property Name="SCLCacheOverride" Value="0" />
<Updates Enabled="TRUE" />
<Display Level="None" AcceptEULA="TRUE" />
</Configuration>
Save this file as config.xml in the C:\ODT folder.
Step 4: Download the Source Files (The "Offline Repack")
Open Command Prompt as Administrator. Navigate to C:\ODT. Run the download command: Many ISPs impose monthly data caps (e
setup.exe /download config.xml
The tool will now download the full 4-6GB Office 365 installation source into C:\ODT. This is your raw, official offline installer.
Step 5: Create the ISO
Now, use a free tool like Folder2ISO or ImgBurn to convert the C:\ODT folder into an ISO file.
Step 6: How to Install from Your New ISO
Result: You now have a legitimate, safe, tamper-free Microsoft Office 365 ISO Offline Installer Repack that you created yourself. Save this file as config
Using a repack that bypasses activation violates Microsoft’s EULA (End User License Agreement). For businesses, this can result in audits, fines, and legal liability. For individuals, your Microsoft account could be terminated.
Verdict: Never download a repack from an unknown source. There is no such thing as a free, safe, pre-activated Office 365 ISO.
Save this as config-365.xml in the same folder as setup.exe:
<Configuration>
<Add OfficeClientEdition="64" Channel="Current">
<Product ID="O365ProPlusRetail">
<Language ID="en-us" />
<ExcludeApp ID="Groove" />
<ExcludeApp ID="Teams" />
</Product>
</Add>
<Property Name="SharedComputerLicensing" Value="0" />
<Property Name="PinIconsToTaskbar" Value="TRUE" />
<Property Name="SCLCacheOverride" Value="0" />
<Updates Enabled="TRUE" />
<Display Level="Full" AcceptEULA="TRUE" />
</Configuration>
Let’s get straight to the point: Downloading a "Microsoft Office 365 ISO Offline Installer Repack" from a torrent site or warez blog is one of the riskiest things you can do.
Here is what security firms (Kaspersky, Norton, Malwarebytes) consistently find inside these repacks:
| Risk type | Likelihood | Impact | |---|---:|---:| | Malware/backdoor in repack | High | Severe (data breach, remote control) | | Legal/copyright violation | High | Severe (fines, liability) | | Update/compatibility break | Medium–High | Moderate–Severe | | Licensing enforcement/action | Medium | Moderate |