> ## Documentation Index
> Fetch the complete documentation index at: https://help.mercury360.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Sync Settings
> Control what emails are synced into the system to improve relevance and performance.
Use **Sync Settings** to control how much email data is pulled into the system. Adjusting sync scope, content level, and time range can help fix missing emails, reduce clutter, and improve inbox performance.
## When to use this
Use this when:
* Emails are missing
* Too many irrelevant emails are visible
* The inbox feels slow or overloaded
* You want to control how much data is synced
Don’t change Sync Settings unless you need to adjust sync behavior. Increasing scope or content can slow down inbox performance.
## Open Sync Settings
Go to **Emails**.
Click **Sync Now**.
This opens sync configuration.
## Sync options
Each option changes what data is pulled and can impact performance.
### Email sync scope
Choose what mailboxes are included:
* **Inbox only** (recommended)
* **Inbox & Sent**
**Choose Inbox only if:**
* You mainly read incoming emails
* You want faster performance
**Choose Inbox & Sent if:**
* You need full conversation tracking
* You want complete visibility across inbound and outbound messages
A wider scope improves context but can add noise and slow sync, especially for high-volume mailboxes.
### Content level
Choose how much content is synced:
* **Headers & snippet only** (recommended)
* **Full message body & attachments**
**Use Headers & snippet only if:**
* You want faster loading
* You don’t need full content immediately
**Use Full message body & attachments if:**
* You frequently open emails in the system
* You need attachments and full details available without delay
Full content sync increases load time and may slow down the inbox.
### Time range
Choose how far back emails are fetched:
* **Last 30 days** (recommended)
* **Last 90 days**
**Use 30 days for:**
* Daily usage
* Faster sync performance
**Use 90 days for:**
* Audits
* Reviewing older communication
Start with **30 days** and expand only if you’re actively looking for older threads.
### Thread behavior
Choose how conversations are handled:
* **Group by thread**
* **Full thread loads only when opened**
This keeps conversations organized and avoids loading unnecessary data upfront.
## Start sync
Click **Start**.
The system updates your inbox based on the selected settings.
