Outlook Tasks

Manage Microsoft Outlook tasks using PowerShell COM objects.

Prerequisites

•Microsoft Outlook installed (scripts auto-start Outlook if it is not running)
•PowerShell 5.1+ (included in Windows 10/11)
•Task assignment requires Exchange/Office 365

List Tasks

outlook-tasks-list.ps1

Browse tasks with optional status filtering. Returns EntryIDs for use with action scripts.

Required Parameters: None (lists active tasks by default)

Parameter	Type	Default	Description
`-Limit`	int	20	Maximum tasks to display
`-IncludeCompleted`	switch	false	Include completed tasks in the list
`-Status`	string	All	Filter by status: All, NotStarted, InProgress, Completed, Waiting, Deferred

powershell

# List active tasks
& "./scripts/outlook-tasks-list.ps1" -Limit 20

# Include completed tasks
& "./scripts/outlook-tasks-list.ps1" -IncludeCompleted

# Filter by status
& "./scripts/outlook-tasks-list.ps1" -Status InProgress

Create Task

outlook-tasks-create.ps1

Create a new task with optional due date, priority, and reminder.

Required Parameters: -Subject

Parameter	Type	Default	Description
`-Subject`	string	Required	Task subject/title
`-DueDate`	datetime	—	Due date (e.g., "2026-02-15")
`-StartDate`	datetime	—	Start date
`-Priority`	string	Normal	Priority: Low, Normal, High
`-Body`	string	—	Task description/notes
`-Reminder`	datetime	—	Reminder date and time (e.g., "2026-02-10 09:00")

powershell

# Create a task with due date
& "./scripts/outlook-tasks-create.ps1" -Subject "Review proposal" -DueDate "2026-02-15" -Priority High

# Create task with reminder
& "./scripts/outlook-tasks-create.ps1" -Subject "Call client" -Reminder "2026-02-10 09:00"

# Create task with body text
& "./scripts/outlook-tasks-create.ps1" -Subject "Prepare slides" -Body "Include Q4 data and projections"

Update Task

outlook-tasks-update.ps1

Edit an existing task's fields. Uses EntryID (preferred) or Index as targeting method.

Required Parameters: -EntryID or -Index, plus at least one field to update

Parameter	Type	Default	Description
`-EntryID`	string	—	Task's unique EntryID (preferred, from list)
`-Index`	int	0	Task position number (fallback)
`-Subject`	string	—	New subject/title
`-DueDate`	datetime	—	New due date
`-StartDate`	datetime	—	New start date
`-Status`	string	—	New status: NotStarted, InProgress, Completed, Waiting, Deferred
`-Priority`	string	—	New priority: Low, Normal, High
`-Body`	string	—	New description/notes
`-PercentComplete`	int	-1	Progress percentage (0-100, auto-updates status)
`-Reminder`	datetime	—	Set reminder date and time
`-ClearReminder`	switch	false	Remove existing reminder
`-IncludeCompleted`	switch	false	Allow targeting completed tasks by Index

powershell

# Update status and progress by EntryID
& "./scripts/outlook-tasks-update.ps1" -EntryID "00000000..." -Status InProgress -PercentComplete 50

# Change due date and priority by index
& "./scripts/outlook-tasks-update.ps1" -Index 1 -DueDate "2026-02-20" -Priority High

# Set a reminder
& "./scripts/outlook-tasks-update.ps1" -EntryID "00000000..." -Reminder "2026-02-10 09:00"

# Clear a reminder
& "./scripts/outlook-tasks-update.ps1" -EntryID "00000000..." -ClearReminder

Complete Task

outlook-tasks-complete.ps1

Mark a task as completed. Supports targeting by EntryID (preferred), Index, or Subject.

Required Parameters: One of -EntryID, -Index, or -Subject

Parameter	Type	Default	Description
`-EntryID`	string	—	Task's unique EntryID (preferred)
`-Index`	int	0	Task position number (fallback, non-completed tasks only)
`-Subject`	string	—	Exact subject match (fallback)

powershell

# Complete by EntryID (preferred)
& "./scripts/outlook-tasks-complete.ps1" -EntryID "00000000..."

# Complete by index
& "./scripts/outlook-tasks-complete.ps1" -Index 1

# Complete by subject
& "./scripts/outlook-tasks-complete.ps1" -Subject "Review proposal"

Assign Task

outlook-tasks-assign.ps1

Delegate a task to another person via Exchange/Microsoft 365. Sends a task request email.

Required Parameters: (-EntryID or -Index) and -AssignTo

Parameter	Type	Default	Description
`-EntryID`	string	—	Task's unique EntryID (preferred)
`-Index`	int	0	Task position number (fallback)
`-AssignTo`	string	Required	Recipient email address
`-KeepCopy`	switch	false	Keep a copy of the task in your list
`-IncludeCompleted`	switch	false	Allow targeting completed tasks by Index

powershell

# Assign by EntryID
& "./scripts/outlook-tasks-assign.ps1" -EntryID "00000000..." -AssignTo "colleague@example.com"

# Assign by index and keep a copy
& "./scripts/outlook-tasks-assign.ps1" -Index 1 -AssignTo "colleague@example.com" -KeepCopy

Delete Task

outlook-tasks-delete.ps1

Delete a task from Outlook. Supports targeting by EntryID (preferred), Index, or Subject.

Required Parameters: One of -EntryID, -Index, or -Subject

Parameter	Type	Default	Description
`-EntryID`	string	—	Task's unique EntryID (preferred)
`-Index`	int	0	Task position number (fallback, non-completed tasks only)
`-Subject`	string	—	Exact subject match (fallback)

powershell

# Delete by EntryID (preferred)
& "./scripts/outlook-tasks-delete.ps1" -EntryID "00000000..."

# Delete by index
& "./scripts/outlook-tasks-delete.ps1" -Index 1

# Delete by subject
& "./scripts/outlook-tasks-delete.ps1" -Subject "Old task"

Reference: Task Status Values

Value	Status
0	Not Started
1	In Progress
2	Completed
3	Waiting
4	Deferred

Reference: Priority Values

Value	Priority
0	Low
1	Normal
2	High