diff --git a/README.md b/README.md
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@@ -1,2 +1,122 @@
-# OutlookManager
+# Email Export and Archiving Script Documentation
+
+## Overview
+This script provides functionality to:
+1. Export emails from Microsoft Outlook to a CSV file.
+2. Move old emails (older than 12 months) to an Online Archive within Outlook.
+
+The script is divided into three main components:
+- `main.py`: The entry point where the user selects between exporting emails or archiving old emails.
+- `export_emails.py`: Handles exporting emails to a CSV file.
+- `archive_emails.py`: Manages moving old emails to an Online Archive.
+
+---
+## Prerequisites
+### Required Python Packages:
+- `pywin32` (for interacting with Outlook)
+
+To install the required package, run:
+```sh
+pip install pywin32
+```
+
+### Permissions:
+- The script must be run with an Outlook profile configured.
+- The user must have access to the mailboxes they want to process.
+
+---
+## `main.py`
+This script acts as the control panel for selecting different operations:
+1. **Export emails to CSV**
+2. **Move old emails to Online Archive**
+
+### Usage:
+Run the script and select the desired option:
+```sh
+python main.py
+```
+Example output:
+```
+Choose an action:
+1. Export emails to CSV
+2. Move old emails to Online Archive
+Select an option (1 or 2):
+```
+
+---
+## `export_emails.py`
+### Functionality:
+- Lists available Outlook mailboxes.
+- Exports email details (subject, date received, size, folder) to a CSV file.
+- Processes both main folders and subfolders recursively.
+- Displays statistics after export.
+
+### Key Functions:
+- `list_outlook_mailboxes()`: Lists available Outlook mailboxes.
+- `export_outlook_emails(output_file, root_folder_name)`: Exports emails from a selected folder.
+- `process_folder(folder, writer, base_folder, counter, last_log_time)`: Recursively processes folders and saves email details.
+- `print_exported_folder_stats(output_file)`: Displays statistics about exported emails.
+
+### Example Output:
+```
+Available mailboxes:
+1. user@example.com
+2. shared@example.com
+Select mailbox number: 1
+Export completed. Total emails processed: 1200. File saved as: ./export/user@example.com/2024_06_01_12_30.csv
+```
+
+---
+## `archive_emails.py`
+### Functionality:
+- Lists Outlook mailboxes.
+- Identifies corresponding Online Archive for selected mailboxes.
+- Moves emails older than 12 months from selected folders (including subfolders) to an Online Archive.
+- Provides a **dry-run** mode to preview how many emails and total size would be moved.
+
+### Key Functions:
+- `find_online_archive(mailboxes, selected_mailbox)`: Finds the corresponding Online Archive for a mailbox.
+- `list_main_folders(mailbox_name)`: Lists main folders for a selected mailbox.
+- `process_folder(folder, archive_folder, run_type, depth)`: Recursively processes a folder and its subfolders, counting or moving emails.
+- `main_archive()`: The main function that orchestrates mailbox selection and processing.
+
+### Example Output:
+```
+Available mailboxes:
+1. user@example.com
+2. shared@example.com
+Select mailbox number: 1
+Main folders:
+1. Inbox
+2. Sent Items
+3. Archive
+Select folders by number (comma-separated, e.g., 1,3,6): 2
+Do you want to perform a dry-run or actually move emails? (dry-run/move): dry-run
+Processing folder: Sent Items
+Folder 'Sent Items': 520 emails (105.4 MB) would be moved.
+Dry-run complete. No emails were moved.
+```
+
+---
+## Error Handling
+### Common Issues:
+- **Missing Online Archive:** If the script cannot locate the Online Archive, it exits with an error.
+- **Folder Access Issues:** If a folder cannot be accessed or created, the script logs an error and continues.
+- **Invalid Selections:** If an invalid mailbox or folder is selected, the script prompts the user and exits.
+
+### Debugging:
+- Enable logging by adding `print()` statements in the script.
+- Run the script in **dry-run** mode before actual execution.
+
+---
+## Future Improvements
+- **Logging System**: Implement a structured logging system instead of `print()`.
+- **GUI Version**: Create a graphical interface for easier navigation.
+- **Selective Email Archiving**: Allow users to define custom retention periods.
+
+---
+## Conclusion
 This script automates the process of exporting and archiving emails in Outlook. It provides a simple way to manage large volumes of emails while maintaining efficiency.
+
+For any issues or improvements, feel free to contribute or modify the script!
+