To effectively and proactively notify everyone about scheduled maintenance, I always use one proven notification service. It allows you to send detailed messages to all stakeholders through different channels: email, SMS, and even through an app if available. In the message, I indicate the exact start time and estimated completion time of the work and also describe what services may not be available at this time. This helps minimize inconvenience to customers and allows employees to plan their tasks in advance. Be sure to consider using such a tool for your needs - it greatly simplifies the communication process.