最近看到了这篇文章Start your journey to becoming a Microsoft 365 developer - Microsoft 365 Developer Blog，里面讲了如何申请Microsoft 365的dev tenant，以及一些学习资料的汇总。Microsoft 365是由Office 365,Azure Portal以及Power Platform这三架马车组成的一个整体，感觉要是能顺带说下如何申请azure portal以及Power Apps(Power Automate)的免费开发环境，那就更完美了。我想用我自己的经历，讲讲如何申请一个完整的M365的开发环境(特别是power automate的开发环境，我以前花了不少时间来摸索)。
大家要是在一个比较完善的公司，可能不需要自己准备开发环境。要是在一个security policy特别严格的公司（比如要试验graph api一些权限要求非常高的api），或者Infrastructure特别糟糕的公司，如果有一个自己的dev环境能做试验，就非常有帮助，也能更好地学习最新的开发技术。
Microsoft 365 Dev Tenant
我们先讲一下Microsoft 365的dev tenant，大家可以去Developer Program | Microsoft 365 Dev Center这个站点申请dev tenant，里面包含了25个Microsoft 365 E5的license以及一些示例用户和示例数据（Teams,SharePoint站点，outlook）
Dev tenant每隔90天会renew一下，要是你一直用就可以一直保留这个dev tenant。如果只为了白嫖免费的Word,Excel这样的office软件，也是极好的。
你申请的dev tenant默认会启用多元素认证（MFA，要你在手机上装一个Microsoft Authenticator，登入站点需要输入里面的密钥），非常麻烦，你得去azure AD里改设置。
dev tenant有一个known issue，如果你用power automate的发邮件的action会报错，说是发邮件的server侦探到很多垃圾邮件还是啥的。我感觉微软故意这样防止你白嫖。。。
你申请的dev tenant只能用免费的Power Automate，如果想用一些premium的action（比如http request),你还得申请Power Apps Developer Plan。
Power Apps Developer Plan
你可以参考这篇文章Sign up for Power Apps Developer Plan - Power Apps | Microsoft Learn去申请Power apps（Power Automate）的开发环境.据说只要你一直用而且没有滥用（abuse），这个开发环境就一直不会过期。 如果登入power automate的官网，你会看见你自己的environment。
切换到你自己的environment，这样你可以使用一些premium的action了
你不能把你自己的dev environment里创建的flow共享给其他人，也不能用其他账号跑connetion。
Azure Portal Free Account
很多时候我们还要写代码，还要借助Azure Portal里的各种service，大家可以到Create Your Azure Free Account Today | Microsoft Azure去申请免费的azure账号。
头30天你有200美元的额度去尝试各种服务（Free subscription，要是你不花，过30天也没了），除此之外还有很多service免费12个月
以下是2022年9月到10月的免费服务
Free services for 12 months
- Azure Cosmos DB, Free Data Stored
- Azure Cosmos DB, Free 100 RU/s
- Storage, Files, LRS Data Stored
- Storage, Premium Page Blob, P6 Disks
- Storage, Standard HDD Managed Disks, LRS Snapshots
- Storage, Standard HDD Managed Disks, Disk Operations
- Storage, Tiered Block Blob, Hot LRS Data Stored
- Virtual Machines, BS Series, B1s
- Virtual Machines, BS Series Windows, B1s
- Networking, Data Transfer Out (GB)
- SQL Database, Single Standard, S0 DTUs
- Storage, Files, Read Operations
- Storage, Files, LRS Write Operations
- Storage, Files, Protocol Operations
- Storage, Files, List Operations
- Storage, Tiered Block Blob, Hot Read Operations
- Storage, Tiered Block Blob, Hot LRS Write Operations
- Networking, Public IP Addresses, IP Address Hours
- Virtual Machines Licenses, Red Hat Enterprise Linux, 1 vCPU VM License
- Storage, Tiered Block Blob, LRS List and Create Container Operations
- Cognitive Services, Custom Vision, S0 Transactions
- Cognitive Services, Custom Vision, S0 Training
- Cognitive Services, Custom Vision, S0 Image Storage
- Cognitive Services, Computer Vision, S1 Transactions
- Cognitive Services, Language Understanding, Speech to Intent
- Cognitive Services, QnA Maker, Standard Unit
- Cognitive Services, Face, Standard Transactions
- Cognitive Services, Translator Text, S1 Translation Transactions
- Cognitive Services, Text Analytics, Standard Text Records
- Cognitive Services, Content Moderator, Standard Transactions
- Cognitive Services, Anomaly Detector, Standard Transactions
- Cognitive Services, Ink Recognizer, S0 Transactions
- Cognitive Services, Personalizer, S0 Transactions
- Load Balancer, Standard, Data Processed
- Load Balancer, Standard, Overage LB Rules and Outbound Rules
- Load Balancer, Standard, Included LB Rules and Outbound Rules
- VPN Gateway, Gateway
- Service Bus, Standard Base Unit
- Container Registry, Standard Registry Unit
- Storage, Tiered Block Blob, Archive LRS Data Stored
- Storage, Tiered Block Blob, Archive Data Retrieval
- Storage, Tiered Block Blob, Archive Read Operations
- Media Services, Video On Demand Encoding, Standard Output Content Minute
- Key Vault, Premium HSM
- Azure Database for PostgreSQL, Flexible Server Backup Storage, LRS Data Stored
- Azure Database for MySQL, Flexible Server Burstable BS Series Compute, B1MS
- Azure Database for PostgreSQL, Flexible Server Storage, Data Stored
- Azure Database for MySQL, Flexible Server Backup Storage, LRS Data Stored
- Azure Database for PostgreSQL, Flexible Server Burstable BS Series Compute, B1MS
- Azure Database for MySQL, Flexible Server Storage, Data Stored
- Azure Applied AI Services, Azure Form Recognizer, S0 Transactions
- Media Services, Streaming Units, Standard Unit
- Media Services, Live Channels, Transcription Event
- Media Services, Live Channels, Pass
过了一个月之后微软会要求你把free subscription升级成“Pay as you go",也就是说你有付钱的风险，不然的话你就没法用。
但是如果你就使用上述免费服务的话，每个月的账单也是0
有了这三个环境，大家就有了完整的Microsoft 365的开发环境，祝大家顺利。
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