> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://help.close.com/technical-support/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://help.close.com/_mcp/server.

# Technical Support

## Docs

- [Close IPs](https://help.close.com/technical-support/close-ips.md): The IP addresses the Close API uses and why they can change. Find the current IP list or filter AWS EC2 ranges in the us-west-2 region.
- [System Requirements and Supported Browsers](https://help.close.com/technical-support/system-requirements-supported-browsers.md): System requirements for Close, including at least 8 GB of RAM, and the browsers supported for web-based calling (the latest two versions of each).
- [Date and Time Formats](https://help.close.com/technical-support/date-and-time-formats.md): Change the date and time format in Close between US and UK styles by updating your macOS, Windows, or browser language settings.
- [Windows Screen Issue](https://help.close.com/technical-support/windows-screen-issue.md): Fix the Close desktop app when it's running on Windows but not visible on screen. Try resizing, Show Desktop, Cascade, Maximize, and Alt + Space.
- [Reset your password](https://help.close.com/technical-support/how-to-reset-your-password.md): Reset your Close password. Open the password reset page, enter your account email, and use the link Close sends you to create a new password.
- [Clearing the Configuration File](https://help.close.com/technical-support/desktop-app/clearing-the-configuration-file.md): Fully reinstall the Close desktop app on Mac or Windows by clearing cookie, session, and cache files. Your Close data isn't affected.
- [Reinstalling the Close app](https://help.close.com/technical-support/desktop-app/reinstalling-the-close-app.md): Fully restart the Close desktop app on Mac or Windows. Closing the window isn't enough, so quit the app from the menu and reopen it.
- [Restarting the Close app](https://help.close.com/technical-support/desktop-app/restarting-the-close-app.md): Fully restart the Close desktop app on Mac or Windows. Closing the window isn't enough, so quit the app from the menu and reopen it.
- [Opening links in the Desktop App](https://help.close.com/technical-support/desktop-app/opening-links-in-the-desktop-app.md): Open Close links in the desktop app instead of your browser. Set app.close.com links to open in the app or use closeio:// deep links.
- [Download the Beta Version of Desktop App](https://help.close.com/technical-support/desktop-app/how-to-download-the-close-desktop-app-beta.md): Switch the Close desktop app to the beta channel on Mac or Windows to test new versions early, and go back to the stable version at any time.
- [Spell check](https://help.close.com/technical-support/spell-check.md): Turn on spell check in the Close desktop app for Windows and Mac, and select one or more languages to check your emails and notes.
- [Data security and privacy](https://help.close.com/technical-support/data-security-and-privacy.md): How Close protects your data: encryption, how your email data is handled, who can access your data, and how security vulnerabilities are handled.
- [Security Vulnerability Disclosure Policy](https://help.close.com/technical-support/data-security-and-privacy/security-vulnerability-disclosure-policy.md): Report a security vulnerability in Close by emailing security@close.com. What details to include in your report.
- [Tasks not syncing with Google Calendar](https://help.close.com/technical-support/tasks-not-syncing-with-google-calendar.md): Close Tasks no longer sync to Google Calendar through a calendar subscription. Use Zapier as a workaround to add Close Tasks to Google Calendar.
- [Email Deliverability](https://help.close.com/technical-support/email-deliverability.md): Improve email deliverability from Close. Avoid spam filters, follow sending best practices, and set up SPF, DKIM, and DMARC for your domain.
- [Connecting Microsoft 365 in managed tenants (Entra admin guide)](https://help.close.com/technical-support/email-deliverability/connecting-microsoft-365-in-managed-tenants-entra-admin-guide.md): How Microsoft Entra administrators grant admin consent for the Close app: the full list of permissions Close requests, why calendar permissions are required, and how to fix the "Administrator approval required" screen.
- [Email Sending Limits](https://help.close.com/technical-support/email-deliverability/email-sending-limits.md): Set email sending limits in Close to stay under your provider's daily thresholds. How limits, sending priority, bulk email, and Workflows interact.
- [Requirements for bulk email senders](https://help.close.com/technical-support/email-deliverability/requirements-for-bulk-email-senders.md): Google and Yahoo bulk sender requirements for email from Close: SPF, DKIM, DMARC, PTR records, TLS, one-click unsubscribe, and spam rate limits.
- [Which IP addresses need access to my SMTP/IMAP server?](https://help.close.com/technical-support/email-deliverability/which-ip-addresses-need-access-to-my-smtpimap-server.md): The IP addresses to allowlist on your SMTP and IMAP servers so Close can send and sync email in restricted corporate or IT environments.
- [Office365 connected accounts](https://help.close.com/technical-support/email-deliverability/office365-connected-accounts.md): Fix Office 365 accounts that disconnect from Close or won't send or sync email. Enable SMTP AUTH and IMAP, and resolve Windows SSO issues.
- [Script installation & setup](https://help.close.com/technical-support/script-installation-setup.md): Set up Python 3, virtualenv, and Git on Mac or Windows to run Close API scripts, and run a sample script against your Close account.
- [Call Quality](https://help.close.com/technical-support/call-quality.md): What the Call Quality Indicator (CQI) in Close means: high RTT, jitter, packet loss, and low MOS warnings, and how to fix headset and network issues.
- [Diagnosing Calling Problems](https://help.close.com/technical-support/call-quality/diagnosing-calling-problems.md): Fix common calling problems in Close: choppy audio, no sound, dropped calls, echo, one-way audio, and calls that won't start.
- [Troubleshooting headset issues](https://help.close.com/technical-support/call-quality/troubleshooting-headset-issues.md): Fix headset problems in Close when it can't access your microphone, your headset doesn't appear in Phone Settings, or you can't adjust volume.
- [Enabling Quality of Service (QoS)](https://help.close.com/technical-support/call-quality/enabling-quality-of-service-qos.md): Set up Quality of Service (QoS) on your router to prioritize Close call traffic, which services to prioritize, and what bandwidth values to enter.
- [Reporting call quality issues](https://help.close.com/technical-support/call-quality/reporting-call-quality-issues.md): Report a call quality issue in Close from the call log menu after any call. Pick what went wrong and add details for the Close Support team.
- [Browser Notification Troubleshooting](https://help.close.com/technical-support/call-quality/browser-notification-troubleshooting.md): Fix missing incoming call notifications when using browser calling in Close. Check your browser and system notification settings step by step.
- [Open Source Acknowledgments](https://help.close.com/technical-support/open-source-acknowledgments.md): Acknowledgments for the open source packages Close uses, plus links to the open source projects Close publishes on GitHub.
- [Close Support Tools](https://help.close.com/technical-support/close-support-tools.md): Use the Close Support Tools portal to manage, export, audit, and clean up your data, from bulk actions and imports to calls, emails, and Smart Views.
- [Record bugs or errors](https://help.close.com/technical-support/debugging-tools/activity-recorder.md): Record a bug or error in Close with the activity recorder from the ? menu, then send the recording to Close Support to troubleshoot.
- [Console Error Logs](https://help.close.com/technical-support/debugging-tools/error-logs.md): Collect console error logs from the Close desktop app or web app, and send them to Close Support to help debug issues they can't reproduce.
- [Network Logs](https://help.close.com/technical-support/debugging-tools/network-logs.md): Generate a network log (.har file) from your browser when Close loads slowly, and send it to Close Support to help diagnose performance issues.